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Стр. 9
Length of Superstructure
(1) Except as provided in paragraph (2) of this Regulation,
the length of a superstructure (S) shall be the mean length of the
parts of the superstructure which lie within the length (L).
(2) Where the end bulkhead of an enclosed superstructure
extends in a fair convex curve beyond its intersection with the
superstructure sides. the length of the superstructure may-be
increased. This increase shall be two-thirds of the fore and aft
extent of the portion of superstructure formed by the curved
bulkhead. The maximum curvature which may be taken into account in
determining this increase is one-half the breadth of the
superstructure at the point of intersection of the curved end of
the superstructure with its side.
Regulation 35
Effective Length of Superstructure
(1) Except as provided for in paragraph (2) of this
Regulation, the effective length (E) of an enclosed superstructure
of standard height shall be its length.
(2) In all cases where an enclosed superstructure of standard
height is set in from the sides of the ship as permitted in
Regulation 3 (10), the effective length shall be the length
modified by the ratio of b/Bs, where b is the breadth of the
superstructure at the middle of its length; and Bs is the breadth
of the ship at the middle of the length of the superstructure.
Where a superstructure is set in for a part of its length,
this modification shall be applied only to the set in part.
(3) Where the height of an enclosed superstructure is less
than the standard height, the effective length shall be its length
reduced in the ratio of the actual height to the standard height.
Where the height exceeds the standard, no increase shall be made
to the effective length of the superstructure.
(4) The effective length of a raised quarter deck, if fitted
with an intact front bulkhead, shall be its length up to a maximum
of 0.6 L. Where the bulkhead is not intact, the raised quarter
deck shall be treated as a poop of less than standard height.
(5) Superstructures which are not enclosed shall have no
effective length.
Regulation 36
Trunks
(1) A trunk or similar structure which does not extend to the
sides of the ship shall be regarded as efficient on the following
conditions:
(a) the trunk is at least as strong as a superstructure;
(b) the hatchways are in the trunk deck, and the hatchway
coamings and covers comply with the requirements of Regulations 13
to 16 inclusive and the width of the trunk deck stringer provides
a satisfactory gangway and sufficient lateral stiffness. However,
small access openings with watertight covers may be permitted in
the freeboard deck;
(c) a permanent working platform fore and aft fitted with
guard rails is provided by the trunk deck, or by detached trunks
connected to superstructures by efficient permanent gangways;
(d) ventilators are protected by the trunk and watertight
covers, if the height of the ventilator is below that specified in
Regulation 19 (3) of this Annex;
(e) open rails are fitted on the weather parts of the
freeboard deck in way of the trunk for at least half their length;
(f) the machinery casings are protected by the trunk, by a
superstructure of at least standard height, or by a deckhouse of
the same height and of equivalent strength;
(g) the breadth of the trunk is at least 60 per cent of the
breadth of the ship; and
(h) where there is no superstructure, the length of the trunk
is at least 0.6 L.
(2) The full length of an efficient trunk reduced in the ratio
of its mean breadth to В shall be its effective length.
(3) The standard height of a trunk is the standard height of a
superstructure other than a raised quarter deck.
(4) Where the height of a trunk is less than the standard
height, its effective length shall be reduced in the ratio of the
actual to the standard height. Where the height of hatchway
coamings on the trunk deck is less than that required under
Regulation 15 (1), a reduction from the actual height of trunk
shall be made which corresponds to the difference between the
actual and the required height of coaming.
Regulation 37
Deduction for Superstructures and Trunks
(1) Where the effective length of superstructures and trunks
is 1.0 L, the deduction from the freeboard shall be
350 millimetres at 24 metres length of ship, 860 millimetres at
85 metres length, and 1070 millimetres at 122 metres length and
above (14 inches at 79 feet length of ship, 34 inches at 279 feet
length, and 42 inches at 400 feet length and above); deductions at
intermediate lengths shall be obtained by linear interpolation.
(2) Where the total effective length of superstructures and
trunks is less than 1.0 L the deduction shall be a percentage
obtained from one of the following tables:
Percentage of Deduction for Type "A" Ships
----------------T---------------------------------------------------¬
¦ ¦Total Effective Length of Superstructures and ¦
¦ ¦Trunks ¦
¦ +-T----T----T----T----T----T----T----T----T----T----+
¦ ¦0¦0.1L¦0.2L¦0.3L¦0.4L¦0.5L¦0.6L¦0.7L¦0.8L¦0.9L¦1.0L¦
+---------------+-+----+----+----+----+----+----+----+----+----+----+
¦Percentage ¦0¦ 7 ¦ 14 ¦ 21 ¦ 31 ¦ 41 ¦ 52 ¦ 63 ¦75.3¦87.7¦100 ¦
¦of deduction ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦for all types ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦of ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦superstructures¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
L---------------+-+----+----+----+----+----+----+----+----+----+-----
Percentages at intermediate lengths of superstructures and
trunks shall be obtained by linear interpolation.
Percentage of Deduction for Type "B" Ships
-----------T--------------------------------------------------------¬
¦ ¦ Total Effective Length of Superstructures and Trunks ¦
¦ +----T-T----T----T----T----T----T----T----T----T----T----+
¦ ¦Line¦0¦0.1L¦0.2L¦0.3L¦0.4L¦0.5L¦0.6L¦0.7L¦0.8L¦0.9L¦1.0L¦
+----------+----+-+----+----+----+----+----+----+----+----+----+----+
¦Ships with¦ I ¦0¦5 ¦10 ¦15 ¦23.5¦32 ¦46 ¦63 ¦75.3¦87.7¦100 ¦
¦forecastle¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦and ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦without ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦detached ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦bridge ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
+----------+----+-+----+----+----+----+----+----+----+----+----+----+
¦Ships with¦ II ¦0¦6.3 ¦12.7¦19 ¦27.5¦36 ¦46 ¦63 ¦75.3¦87.7¦100 ¦
¦forecastle¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦and ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦detached ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦bridge ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
L----------+----+-+----+----+----+----+----+----+----+----+----+-----
Percentages at intermediate lengths of superstructures and
trunks shall be obtained by linear interpolation.
(3) For ships of Type "B":
(a) Where the effective length of a bridge is less than 0.2
L, the percentages shall be obtained by linear interpolation
between lines I and II.
(b) Where the effective length of a forecastle is more than
0.4 L, the percentages shall be obtained from line II.
(c) Where the effecive length of a forecastle is less than
0.07 L, the above percentages shall be reduced by:
(0.07L - f)
5 x -------------
0.07L
where f is the effective length of the forecastle.
Regulation 38
Sheer
General
(1) The sheer shall be measured from the deck at side to a
line of reference drawn parallel to the keel through the sheer
line amidships.
(2) In ships designed with a rake of keel, the sheer shall be
measured in relation to a reference line drawn parallel to the
design load waterline.
(3) In flush deck ships and in ships with detached
superstructures the sheer shall be measured at the freeboard deck.
(4) In ships with topsides of unusual form in which there is a
step or break in the topsides, the sheer shall be considered in
relation to the equivalent depth amidships.
(5) In ships with a superstructure of standard height which
extends over the whole length of the freeboard deck, the sheer
shall be measured at the superstructure deck. Where the height
exceeds the standard the least difference (Z) between the actual
and standard heights shall be added to each end ordinate.
Similarly, the intermediate ordinates at distances of 1/6 L and
1/3 L from each perpendicular shall be increased by 0.444 Z and
0.111 Z respectively.
(6) Where the deck of an enclosed superstructure has at least
the same sheer as the exposed freeboard deck, the sheer of the
enclosed portion of the freeboard deck shall not be taken into
account.
(7) Where an enclosed poop or forecastle is of standard height
with greater sheer than that of the freeboard deck, or is of more
than standard height, if paragraph (6) of this Regulation has not
been used an addition to the sheer of the freeboard deck shall be
made as provided in paragraph (12) of this Regulation.
Standard Sheer Profile
(8) The ordinates of the standard sheer profile are given in
the following table:
Standard Sheer Profile
(Where L is in metres)
--------------T----------------------T---------------T-----------¬
¦ ¦ Station ¦ Ordinate ¦ Factor ¦
¦ ¦ ¦ (in ¦ ¦
¦ ¦ ¦ millimetres) ¦ ¦
+-------------+----------------------+---------------+-----------+
¦ ¦After Perpendicular ¦25 (L/3 + 10)¦ 1 ¦
¦After ¦1/6 L from A. P. ¦11.1 (L/3 + 10)¦ 3 ¦
¦half ¦1/3 L from A. P. ¦ 2.8 (L/3 + 10)¦ 3 ¦
¦ ¦Amidships ¦ 0 ¦ 1 ¦
+-------------+----------------------+---------------+-----------+
¦ ¦Amidships ¦ 0 ¦ 1 ¦
¦Forward ¦1/3 L from F. P. ¦ 5.6 (L/3 + 10)¦ 3 ¦
¦half ¦1/6 L from F. P. ¦22.2 (L/3 + 10)¦ 3 ¦
¦ ¦Forward Perpendicular ¦50 (L/3 + 10)¦ 1 ¦
L-------------+----------------------+---------------+------------
Standard Sheer Profile
(Where L is in feet)
--------------T---------------------T----------------T-----------¬
¦ ¦ Station ¦ Ordinate ¦ Factor ¦
¦ ¦ ¦ (in inches) ¦ ¦
+-------------+---------------------+----------------+-----------+
¦ ¦After Perpendicular ¦0.1 L + 10 ¦ 1 ¦
¦After ¦1/6 L from A. P. ¦0.0444 L + 4.44¦ 3 ¦
¦half ¦1/3 L from A. P. ¦0.0111 L + 1.11¦ 3 ¦
¦ ¦Amidships ¦ 0 ¦ 1 ¦
+-------------+---------------------+----------------+-----------+
¦ ¦Amidships ¦ 0 ¦ 1 ¦
¦Forward ¦1/3 L from F. P. ¦0.0222 L + 2.22¦ 3 ¦
¦half ¦1/6 L from F. P. ¦0.0888 L + 8.88¦ 3 ¦
¦ ¦Forward Perpendicular¦0.2 L + 20 ¦ 1 ¦
L-------------+---------------------+----------------+------------
Measurement of Variation from Standard Sheer Profile
(9) Where the sheer profile differs from the standard, the
four ordinates of each profile in the forward or after half shall
be multiplied by the appropriate factors given in the table of
ordinates. The difference between the sums of the respective
products and those of the standard divided by 8 measures the
deficiency or excess of sheer in the forward or after half. The
arithmetical mean of the excess or deficiency in the forward and
after halves measures the excess or deficiency of sheer.
(10) Where the after half of the sheer has an excess and the
forward half of the sheer has a deficiency, no credit shall be
allowed for the part in excess and deficiency only shall be
measured.
(11) Where there is an excess in the forward half of the sheer
and in the after half there is a deficiency which does not exceed
25 per cent, credit shall be allowed for the excess. When the
deficiency in the after part of the sheer exceeds 50 per cent,
then no credit shall be given for the excess sheer forward. When
the deficiency of the after sneer is between 25 per cent and
50 per cent intermediate allowances may be granted for excess
sheer forward.
(12) When the actual height of a poop or forecastle at the end
ordinate exceeds the standard the following formula shall be used:
y L'
s = --- ---
3 L
where s = sheer credit, to be deducted from the deficiency or
added to the excess of sheer,
y = difference between actual and standard height of
superstructure at the end ordinate in millimetres (inches),
L' = mean enclosed length of poop or forecastle up to a
maximum length of 0.5 L,
L = length of ship as defined in Regulation 3 (1) of this
Annex.
The above formula provides a curve in the form of a parabola
tangent to the actual sheer curve at the freeboard deck and
intersecting the end ordinate at a point below the superstructure
deck a distance equal to the standard height of a superstructure.
The superstructure shall not be less than standard height above
this curve at any point. This curve shall be used in determining
the sheer profile for forward and after halves of the ship.
Correction for Variations from Standard Sheer Profile
(13) The correction for sheer shall be the deficiency or
excess of sheer (see paragraphs (9) to (12) inclusive of this
Regulation), multiplied by
S
0.75 - ----
2L
where S is the total length of enclosed superstructures.
Addition for Deficiency in Sheer.
(14) Where the sheer is less than the standard, the correction
for deficiency in sheer (see paragraph (13) of this Regulation)
shall be added to the freeboard.
Deduction for Excess Sheer
(15) In ships where an enclosed superstructure covers 0.1 L
before and 0.1 L abaft amidships, the correction for excess of
sheer as calculated under the provisions of paragraph (13) of this
Regulation shall be deducted from the freeboard; in ships where no
enclosed superstructure covers amidships, no deduction shall be
made from the freeboard; where an enclosed superstructure covers
less than 0.1 L before and 0.1 L abaft amidships, the deduction
shall be obtained by linear interpolation. The maximum deduction
for excess sheer shall be at the rate of 125 millimetres per
100 metres of length (1 1/2 inches per 100 feet of length).
Regulation 39
Minimum Bow Height
(1) The bow height defined as the vertical distance at the
forward perpendicular between the waterline corresponding to the
assigned summer freeboard and the designed trim and the top of the
exposed deck at side shall be not less than:
for ships below 250 metres in length,
L 1.36
56L (1 - ---) ----------- millimetres;
500 C + 0.68
b
for ships of 250 metres and above in length,
1.36
7000 ---------- millimetres,
C + 0.68
b
where L is the length of the ship in metres,
C is the block coefficient which is to be taken as not less
b
than 0.68 or,
for ships below 820 feet in length,
L 1.36
0.672L (1 - ----) --------- inches;
1640 C + 0.68
b
for ships of 820 feet and above in length,
1.36
275.6 --------- inches;
C + 0.68
b
where L is the length of the ship in feet.
C is the block coefficient which is to be taken as not less
b
than 0.68.
(2) Where the bow height required in paragraph (1) of this
Regulation Is obtained by sheer, the sheer shall extend for at
least 15 per cent of the length of the ship measured from the
forward perpendicular. Where it is obtained by fitting a
superstructure, such superstructure shall extend from the stem to
a point at least 0.07 L abaft the forward perpendicular, and it
shall comply with the following requirements:
(a) for ships not over 100 metres (328 feet) in length и shall
be enclosed as defined in Regulation 3 (10), and
(b) for ships over 100 metres (328 feet) in length it need not
comply with Regulation 3 (10) but Shall be fitted with closing
appliances to the satisfaction of the Administration.
(3) Ships which, to suit exceptional operational requirements,
cannot meet the requirements of paragraphs (1) and (2) of this
Regulation may be given special consideration by the
Administration.
Regulation 40
Minimum Freeboards
Summer Freeboard
(1) The minimum freeboard in summer shall be the freeboard
derived from the tables in Regulation 28 as modified by the
corrections in Regulations 27, as applicable, 29, 30, 31, 32, 37,
38 and, if applicable, 39.
(2) The freeboard in salt water, as calculated in accordance
with paragraph (1) of this Regulation, but without the correction
for deck line, as provided by Regulation 32, shall not be less
than 50 millimetres (2 inches). For ships having in position 1
hatchways with covers which do not comply with the requirements of
Regulations 15 (7), 16 or 26, the freeboard shall be not less than
150 millimetres (6 inches).
Tropical Freeboard
(3) The minimum Tropical freeboard shall be the freeboard
obtained by a deduction from the summer freeboard of one
forty-eighth of the summer draught measured from the keel as
defined in Regulation 3 (5) (a) to the centre of the ring of the
load line mark.
(4) The freeboard in salt water, as calculated in accordance
with paragraph (1) of this Regulation, but without the correction
for deck-line, as provided by Regulation 32, shall not be less
than 50 millimetres (2 inches). For ships having in position 1
hatchways with covers which do not comply with the requirements of
Regulations 15 (7), 16 or 26, the freeboard shall be not less than
150 millimetres (6 inches).
Winter Freeboard
(5) The minimum Winter freeboard shall be the freeboard
obtained by an addition to the summer freeboard of one
forty-eighth of summer draught, measured from the top of the keel
to the centre of the ring of the load line mark.
Winter North Atlantic Freeboard
(6) The minimum freeboard for ships of not more than 100
metres (328 feet) in length, which enter any part of the North
Atlantic defined in Regulation 52 (Annex II) during the winter
seasonal period, shall be the winter freeboard plus 50 millimetres
(2 inches). For other ships, the Winter North Atlantic Freeboard
shall be the winter freeboard.
Fresh Water Freeboard
(7) The minimum freeboard in fresh water of unit density shall
be obtained by deducting from the minimum freeboard in salt water:
delta
----- centimetres (inches)
40T
where delta = displacement in salt water in tons at the summer
load waterline,
T = tons per centimetre (inch) immersion in salt water at the
summer load waterline.
(8) Where the displacement at the summer load waterline cannot
be certified, the deduction shall be one forty-eighth of summer
draught measured from the keel as defined in Regulation 3 (5) (a)
to the centre of the ring of the load line mark.
Chapter IV. SPECIAL REQUIREMENTS FOR SHIPS
ASSIGNED TIMBER FREEBOARDS
Regulation 41
Application of this Charter
Regulations 42 to 45 inclusive apply only to ships to which
timber load lines are assigned.
Regulation 42
Definitions
(1) Timber Deck Cargo. The term "timber deck cargo" means a
cargo of timber carried on an uncovered part of a freeboard or
superstructure deck. The term does not include wood pulp or
similar cargo.
(2) Timber Load Line. A timber deck cargo may be regarded as
giving a ship a certain additional buoyancy and a greater degree
of protection against the sea. For that reason, ships carrying a
timber deck cargo may be granted a reduction of freeboard
calculated according to tile provisions of Regulation 45 and
marked on the ship's side in accordance with the provisions of
Regulation 6 (3) and (4). However, in order that such special
freeboard may be granted and used, the timber deck cargo shall
comply with certain conditions which are laid down in Regulation
44, and the ship itself shall also comply with certain conditions
relating to its construction which are set out in Regulation 43.
Regulation 43
Construction of Ship
Superstructure
(1) Ships shall have a forecastle of at least standard height
and a length of at least 0.07 L. In addition, if the ship is less
than 100 metres (328 feet) in Length, a poop of at least standard
height, or a raised quarter deck with either a deckhouse or a
strong steel hood of at least the same total height shall be
fitted aft.
Double Bottom Tanks
(2) Double bottom tanks where fitted within the midship half
length of the ship shall have adequate watertight longitudinal
subdivision.
Bulwarks
(3) The ship shall be fitted either with permanent bulwarks at
least 1 metre (39 1/2 inches) in height, specially stiffened on
the upper edge and supported by strong bulwark stays attached to
the deck and provided with necessary freeing ports, or with
efficient rails of the same height and of specially strong
construction.
Regulation 44
Stowage
General
(1) Openings in the weather deck over which cargo is stowed
shall be securely closed and battened down. The ventilators shall
be efficiently protected.
(2) Timber deck cargo shall extend over at least the entire
available length which is the total length of the well or wells
between superstructures. Where there is no limiting superstructure
at the after end, the timber shall extend at least to the after
end of the aftermost hatchway. The timber shall be stowed as
solidly as possible to at least the standard height of a
superstructure other than a raised quarter deck.
(3) On a ship within a seasonal winter zone in winter, the
height of the deck cargo above the weather deck shall not exceed
one-third of the extreme breadth of the ship.
(4) The timber deck cargo shall be compactly stowed, lashed
and secured. It shall not interfere in any way with the navigation
and necessary work of the ship.
Uprights
(5) Uprights, when required by the nature of the timber, shall
be of adequate strength considering the breadth of the ship; the
spacing shall be suitable for the length and character of timber
carried, but shall not exceed 3 metres (9.8 feet). Strong angles
or metal sockets or equally efficient means shall be provided for
securing the uprights.
Lashings
(6) Timber deck cargo shall be efficiently secured throughout
its length by independent over-all lashings spaced not more than
3 metres (9.8 feet) apart. Eye plates for these lashings shall be
efficiently attached to the sheer strake or to the deck stringer
plate at intervals of not more than 3 metres (9.8 feet). The
distance from an end bulkhead of a superstructure to the first eye
plate shall be not more than 2 metres (6.6 feet). Eye plates and
lashings shall be provided 0.6 metres (23 1/2 inches) and 1.5
metres (4.9 feet) from the ends of timber deck cargoes where there
is no bulkhead.
(7) Lashings shall be not less than 19 millimetres (3/4 inch)
close link chain or flexible wire rope of equivalent strength,
fitted with sliphooks and turnbuckles, which shall be accessible
at all times. Wire rope lashings shall have a short length of long
link chain to permit the length of lashings to be regulated.
(8) When timber is in lengths less than 3.6 metres (11.8 feet)
the spacing of the lashings shall be reduced or other suitable
provisions made to suit the length of timber.
(9) All fittings required for securing the lashings shall be
of strength corresponding to the strength of the lashings.
Stability
(10) Provision shall be made for a safe margin of stability at
all stages of the voyage, regard being given to additions of
weight, such as those due to absorption of water and icing and to
losses of weight such as those due to consumption of fuel and
stores.
Protection of Crew, Access to Machinery Spaces, etc.
(11) In addition to the requirements of Regulation 25 (5) of
this Annex guard rails or life lines spaced not more than 330
millimetres (13 inches) apart vertically shall be provided on each
side of the deck cargo to a height of at least 1 metre
(39 1/2 inches) above the cargo.
Steering Arrangements
(12) Steering arrangements shall be effectively protected from
damage by cargo and, as far as practicable, shall be accessible.
Efficient provision shall be made for steering in the event of a
breakdown in the main steering arrangements.
Regulation 45
Computation for Freeboard
(1) The minimum summer freeboard shall be computed in
accordance with Regulations 27 (5), 27 (5), 27 (11), 28, 29, 30,
31, 32, 37 and 38, except that Regulation 3 as modified by
substituting the following percentages for those given in
Regulation 37:
---------------T----------------------------------------------------¬
¦ ¦ Total Effective Length of Superstructures ¦
¦ +--T----T----T----T----T----T----T----T----T----T----+
¦ ¦0 ¦0.1L¦0.2L¦0.3L¦0.4L¦0.5L¦0.6L¦0.7L¦0.8L¦0.9L¦1.0L¦
+--------------+--+----+----+----+----+----+----+----+----+----+----+
¦Percentage ¦20¦ 31 ¦ 42 ¦ 53 ¦ 64 ¦ 70 ¦ 76 ¦ 82 ¦ 88 ¦ 94 ¦100 ¦
¦of deduction ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦for all types ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦of ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
¦superstructure¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦ ¦
L--------------+--+----+----+----+----+----+----+----+----+----+-----
Percentages at intermediate lengths of superstructures shall
be obtained by linear interpolation.
(2) The Winter Timber Freeboard shall be obtained by adding to
the Summer Timber Freeboard one thirty-sixth of the moulded summer
timber draught.
(3) The Winter North Atlantic Timber Freeboard shall be the
same as the Winter North Atlantic Freeboard prescribed in
Regulation 40 (6).
(4) The Tropical Timber Freeboard shall be obtained by
deducting from the Summer Timber Freeboard one forty-eighth of the
moulded summer timber draught.
(5) The Fresh Water Timber Freeboard shall be computed in
accordance with Regulation 40 (7) or 40 (8) based on the summer
timber load waterline.
Annex II
ZONES, AREAS AND SEASONAL PERIODS
The zones and areas in this Annex are, in general, based on
the following criteria:
Summer - not more than 10 per cent winds of force 8 Beaufort
(34 knots) or more.
Tropical - not more than 1 per cent winds of force 8 Beaufort
(34 knots) or more. Not more than one tropical storm in 10 years
in an area of 5 degr. square in any one separate calendar month.
In certain special areas, for practical reasons, some degree
of relaxation has been found acceptable.
A chart is attached to this Annex to illustrate the zones and
areas defined below.
Regulation 46
Northern Winter Seasonal Zones and Area
(1) North Atlantic Winter Seasonal Zones I and II
(a) The North Atlantic Winter Seasonal Zone I lies within the
meridian of longitude 50 degr. W from the coast of Greenland to
latitude 45 degr. N, thence the parallel of latitude 45 degr. N to
longitude 15 degr. W, thence the meridian of longitude 15 degr. W
to latitude 60 degr. N, thence the parallel of latitude 60 degr. N
to the Greenwich Meridian, thence this meridian northwards.
Seasonal periods:
Winter: 16 October to 15 April
Summer: 16 April to 15 October.
(b) The North Atlantic Winter Seasonal Zone II lies within the
meridian of longitude 68 degr. 30 min. W from the coast of the
United States to latitude 40 degr. N, thence the rhumb Line to the
point latitude 36 degr. N, longitude 73 degr. W, thence the
parallel of latitude 36 degr. N to longitude 25 degr. W and thence
the rhumb line to Cape Torinana.
Excluded from this zone are the North Atlantic Winter Seasonal
Zone I and the Baltic Sea bounded by the parallel of the latitude
of The Skaw in the Skagerrak.
Seasonal periods:
Winter: 1 November to 31 March
Summer: 1 April to 31 October.
(2) North Atlantic Winter Seasonal Area
The boundary of the North Atlantic Winter Seasonal Area is -
the meridian of longitude 68 degr. 30 min. W from the coast of the
United States to latitude 40 degr. N, thence, the rhumb line to
the southernmost intersection of the meridian of longitude 61
degr. W with the coast of Canada and thence the east coasts of
Canada and the United States.
Seasonal periods:
For ships over 100 metres (328 feet) in length:
Winter: 16 December to 15 February
Summer: 16 February to 15 December.
For ships of 100 metres (328 feet) and under in length:
Winter: 1 November to 31 March
Summer: 1 April to 31 October.
(3) North Pacific Winter Seasonal Zone
The southern boundary of the North Pacific Winter Seasonal
Zone is the parallel of latitude 50 degr. N from the east coast of
the USSR to the west coast of Sakhalin, thence the west coast of
Sakhalin to the southern extremity of Cape Kril'on, thence the
rhumb line to Wakkanai, Hokkaido, Japan, thence the east and south
coasts of Hokkaido to longitude 145 degr. E, thence the meridian
of longitude 145 degr. E to latitude 35 degr. N, thence the
parallel of latitude 35 degr. N to longitude 150 degr. W and
thence the rhumb line to the southern extremity of Dall Island,
Alaska.
Seasonal periods:
Winter: 16 October to 15 April
Summer: 16 April to 15 October.
Regulation 47
Southern Winter Seasonal Zone
The northern boundary of the Southern Winter Seasonal Zone
is - the rhumb line from the east coast of the American continent
at Cape Tres Puntas to the point latitude 34 degr. S, longitude 50
degr. W, thence the parallel of latitude 34 degr. S to longitude
17 degr. E, thence the rhumb line to the point latitude 35 degr.
10 min. S, longitude 20 degr. E, thence the rhumb line to the
point latitude 34 degr. S, longitude 28 degr. E, thence along the
rhumb line to the point latitude 35 degr. 30 min. S, longitude 118
degr. E, and thence the rhumb line to Cape Grim on the northwest
coast of Tasmania; thence along the north and east coasts of
Tasmania to the southernmost point of Bruny Island, thence the
rhumb line to Black Rock Point on Stewart Island, thence the rhumb
line to the point latitude 47 degr. S, longitude 170 degr. E,
thence along the rhumb Sine to the point latitude 33 degr. S,
longitude 170 degr. W, and thence the parallel of latitude 33
degr. S to the west coast of the American continent. Valparaiso is
to be considered as being on the boundary line of the Summer and
Winter Seasonal Zones.
Seasonal periods:
Winter: 16 April to 15 October
Summer: 16 October to 15 April.
Regulation 48
Tropical Zone
(1) Northern Boundary of the Tropical Zone
The northern boundary of the Tropical Zone is the parallel of
latitude 13 degr. N from the east coast of the American continent
to longitude 60 degr. W, thence the rhumb line to a point in
latitude 10 degr. N, longitude 58 degr. W, thence the parallel of
latitude 10 degr. N to longitude 20 degr. W, thence the meridian
of longitude 20 degr. W to latitude 30 degr. N and thence the
parallel of latitude 30 degr. N to the west coast of Africa; from
the east coast of Africa the parallel of latitude 8 degr. N to
longitude 70 degr. E, thence the meridian of longitude 70 degr. E
to latitude 13 degr. N, thence the parallel of latitude 13 degr. N
to the west coast of India; thence around the south coast of India
to latitude l0 degr. 30 min. N on the east coast of India, thence
the rhumb line to a point in latitude 9 degr. N, longitude 82
degr. E, thence the meridian of longitude 82 degr. E to latitude 8
degr. N, thence the parallel of latitude 8 degr. N to the west
coast of Malaysia, thence the coast of South-East Asia to the east
coast of Viet-Nam at latitude 10 degr. N, thence the parallel of
latitude 10 degr. N to longitude 45 degr. E, thence the meridian
of longitude 145 degr. E to latitude 13 degr. N and thence the
parallel of latitude 13 degr. N to the west coast of the American
continent.
Saigon is to considered as being on the boundary line of the
Tropical Zone and the Seasonal Tropical Area.
(2) Southern Boundary of the Tropical Zone
The southern boundary of the Tropical Zone is - the rhumb line
from the Port of Santos, Brazil, to the point where the meridian
of longitude 40 degr. W intersects the Tropic of Capricorn; thence
the Tropic of Capricorn to the west coast of Africa; from the east
coast of Africa the parallel of latitude 20 degr. S to the west
coast of Madagascar, thence the west and north coasts of
Madagascar to longitude 50 degr. E, thence the meridian of
longitude 50 degr. E to latitude 10 degr. S, thence the parallel
of latitude 10 degr. S to longitude 98 degr. E, thence the rhumb
line to Port Darwin, Australia, thence the coasts of Australia and
Wessel Island eastwards to Cape Wessel, thence the parallel of
latitude 11 degr. S to the west side of Cape York; from the west
side of Cape York the parallel of latitude 11 degr. S to
longitude 150 degr. W, thence the rhumb line to the point latitude
26 degr. S, longitude 75 degr. W, and thence the rhumb line to the
west coast of the American continent at latitude 30 degr. S.
Coquimbo and Santos are to be considered as being on the
boundary line of the Tropical and Summer Zones.
(3) Areas to be included in the Tropical Zone
The following areas are to be treated as included in the
Tropical Zone -
(a) The Suez Canal, the Red Sea and the Gulf of Aden, from
Port Said to the meridian of longitude 45 degr. E.
Aden and Berbera are to be considered as being on the boundary
line of the Tropical Zone and the Seasonal Tropical Area.
(b) The Persian Gulf to the meridian of longitude 59 degr. E.
(c) The area bounded by the parallel of latitude 22 degr. S
from the east coast of Australia to the Great Barrier Reef, thence
the Great Barrier Reef to latitude 11 degr. S. The northern
boundary of the area is the southern boundary of the Tropical
Zone.
Regulation 49
Seasonal Tropical Areas
The following are Seasonal Tropical Areas:
(1) In the North Atlantic
An area bounded -
on the north by the rhumb line from Cape Catoche, Yucatan, to
Cape San Antonio, Cuba, the north coast of Cuba to latitude 20
degr. N and thence the parallel of latitude 20 degr. N to
longitude 20 degr. W;
on the west by the coast of the American continent;
on the south and east by the northern boundary of the Tropical
Zone.
Seasonal periods:
Tropical: 1 November to 15 July
Summer: 16 July to 31 October.
(2) In the Arabian Sea
An area bounded -
on the west by the coast of Africa, the meridian of longitude
45 degr. E in the Gulf of Aden, the coast of South Arabia and the
meridian of longitude 59 degr. E in the Gulf of Oman;
on the north and east by the coasts of Pakistan and India;
on the south by the northern boundary of the Tropical Zone.
Seasonal periods:
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