Partial subdivision draught (dp) is the light service draught plus 60% of the difference between
the light service draught and the deepest subdivision draught.
24
13 Trim is the difference between the draught forward and the draught aft, where the draughts are
measured at the forward and aft:(
Replaced by
Res.MSC.421(98)
)
.1 perpendiculars respectively, as defined in the International Convention on Load Lines in force,
for ships subject to the provisions of regulation II-1/1.1.1.1; and
.2 terminals respectively, for ships not subject to the provisions of regulation II-1/1.1.1.1 but
constructed on or after 1 January 2009;
disregarding any rake of keel.
14 Permeability (μ) of a space is the proportion of the immersed volume of that space which can
be occupied by water.
Refer to the
IACS UI SC225
The occupied volume by flooded water of a flooded space in the
SOLAS Chapter II-1 (Regulation 2(14))
Refer to the
MSC.1/Circ.1362
UNIFIED INTERPRETATION OF SOLAS CHAPTER II-1
15 Machinery spaces are spaces between the watertight boundaries of a space containing the main
and auxiliary propulsion machinery, including boilers, generators and electric motors primarily
intended for propulsion. In the case of unusual arrangements, the Administration may define the
limits of the machinery spaces.
16 Weathertight means that in any sea conditions water will not penetrate into the ship.
17 Watertight means having scantlings and arrangements capable of preventing the passage of
water in any direction under the head of water likely to occur in intact and damaged conditions. In
the damaged condition, the head of water is to be considered in the worst situation at equilibrium,
including intermediate stages of flooding.
18 Design pressure means the hydrostatic pressure for which each structure or appliance assumed
watertight in the intact and damage stability calculations is designed to withstand.
19 Bulkhead deck in a passenger ship means the uppermost deck:(
Replaced by
Res.MSC.421(98)
)
.1 to which the main bulkheads and the ship's shell are carried watertight, for ships subject to
the provisions of regulation II-1/1.1.1.1; and
.2 at any point in the subdivision length (Ls) to which the main bulkheads and the ship's shell
are carried watertight and the lowermost deck from which passenger and crew evacuation will
not be impeded by water in any stage of flooding for damage cases defined in regulation 8 and
25
in part B-2 of this chapter, for ships not subject to the provisions of regulation II-1/1.1.1.1 but
constructed on or after 1 January 2009.
The bulkhead deck may be a stepped deck. In a cargo ship not subject to the provisions of
regulation II-1/1.1.1.1 but constructed on or after 1 January 2009, the freeboard deck may be
taken as the bulkhead deck.
20 Deadweight is the difference in tonnes between the displacement of a ship in water of a specific
gravity of 1.025 at the draught corresponding to the assigned summer freeboard and the
lightweight of the ship.
21 Lightweight is the displacement of a ship in tonnes without cargo, fuel, lubricating oil, ballast
water, fresh water and feedwater in tanks, consumable stores, and passengers and crew and their
effects.
Refer to the UI(
MSC.1/Circ.1539
)
22 Oil tanker is the oil tanker defined in regulation 1 of Annex I of the Protocol of 1978 relating to
the International Convention for the Prevention of Pollution from Ships, 1973.
23 Ro-ro passenger ship means a passenger ship with ro-ro spaces or special category spaces as
defined in regulation II-2/3.
24 Bulk carrier means a bulk carrier as defined in regulation XII/1.1.
25 Keel line is a line parallel to the slope of the keel passing amidships through:
.1 the top of the keel at centreline or line of intersection of the inside of shell plating with the
keel if a bar keel extends below that line, on a ship with a metal shell; or
.2 in wood and composite ships, the distance is measured from the lower edge of the keel
rabbet. When the form at the lower part of the midship section is of a hollow character, or
where thick garboards are fitted, the distance is measured from the point where the line of the
flat of the bottom continued inward intersects the centreline amidships.
26 Amidship is at the middle of the length (L).(
Deleted by
Res.MSC.421(98)
)
26 2008 IS Code means the International Code on Intact Stability, 2008, consisting of an
introduction, part A (the provisions of which shall be treated as mandatory) and part B (the
provisions of which shall be treated as recommendatory), as adopted by
resolution MSC.267(85)
,
provided that:
26
.1 amendments to the introduction and part A of the Code are adopted, brought into force and
take effect in accordance with the provisions of article VIII of the present Convention concerning
the amendment procedures applicable to the Annex other than chapter I thereof; and
.2 amendments to part B of the Code are adopted by the Maritime Safety Committee in
accordance with its Rules of Procedure.
27 Goal-based Ship Construction Standards for Bulk Carriers and Oil Tankers means the
International Goal-Based Ship Construction Standards for Bulk Carriers and Oil Tankers, adopted by
the Maritime Safety Committee by
resolution MSC.287(87)
, as may be amended by the
Organization, provided that such amendments are adopted, brought into force and take effect in
accordance with the provisions of article VIII of the present Convention concerning the amendment
procedures applicable to the annex other than chapter I thereof.
28 IGF Code means the International Code of safety for ships using gases or other low-flashpoint
fuels as adopted by the Maritime Safety Committee of the Organization by
resolution MSC.391(95)
,
as may be amended by the Organization, provided that such amendments are adopted, brought
into force and take effect in accordance with the provisions of article VIII of the present Convention
concerning the amendment procedures applicable to the annex other than chapter I.
29 Low-flashpoint fuel means gaseous or liquid fuel having a flashpoint lower than otherwise
permitted under regulation II-2/4.2.1.1.
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