1 Every passenger ship, regardless of size, and every cargo
ship having a length (L) of 24 m and upwards, shall be inclined upon its
completion. The lightship displacement and the longitudinal, transverse and vertical
position of its centre of gravity shall be determined. In addition to any other
applicable requirements of the present regulations, ships having a length of 24 m and
upwards shall as a minimum comply with the requirements of part A of the 2008 IS
Code.
2 The Administration may allow the inclining test of an
individual cargo ship to be dispensed with provided basic stability data are available
from the inclining test of a sister ship and it is shown to the satisfaction of the
Administration that reliable stability information for the exempted ship can be obtained
from such basic data, as required by regulation 5-1.
A lightweight survey shall be carried out upon completion and the ship shall be inclined
whenever in comparison with the data derived from the sister ship, a deviation from the
lightship displacement exceeding 1% for ships of 160 m or more in length and 2% for
ships of 50 m or less in length and as determined by linear interpolation for
intermediate lengths or a deviation from the lightship longitudinal centre of gravity
exceeding 0.5% of L is found.
3 The Administration may also allow the inclining
test of an individual ship or class of ships especially designed for
the carriage of liquids or ore in bulk to be dispensed with when reference
to existing data for similar ships clearly indicates that, due to
the ship's proportions and arrangements, more than sufficient metacentric
height will be available in all probable loading conditions.
4 Where any alterations are made to a ship so
as to materially affect the stability information supplied to the
master, amended stability information shall be provided. If necessary
the ship shall be re-inclined. The ship shall be re-inclined if anticipated
deviations exceed one of the values specified in paragraph 5.
5 At periodical intervals not exceeding five years, a
lightweight survey shall be carried out on all passenger ships to verify any changes in
lightship displacement and longitudinal centre of gravity. The ship shall be re-inclined
whenever, in comparison with the approved stability information, a deviation from the
lightship displacement exceeding 2% or a deviation of the longitudinal centre of gravity
exceeding 1% of L is found or anticipated.
6 Every ship shall have scales of draughts marked
clearly at the bow and stern. In the case where the draught marks
are not located where they are easily readable, or operational constraints
for a particular trade make it difficult to read the draught marks,
then the ship shall also be fitted with a reliable draught indicating
system by which the bow and stern draughts can be determined.