2.1 The intact stability of special purpose ships
should comply with the provisions of section 2.5 of Part B of the
2007 Intact Stability Code.
2.2 The subdivision and damage stability of special purpose
ships should in general be in accordance with SOLAS chapter II-1
where the ship is considered a passenger ship, and special personnel are considered
passengers, with an R-value calculated as follows:
-
.1 where the ship is certified to carry 240 persons
or more, the R-value is assigned as R;
-
.2 where the ship is certified to carry not more than
60 persons, the R-value is assigned as 0.8R; and
-
.3 for more than 60 (but not more than 240) persons,
the R-value should be determined by linear interpolation between the
R-values given in .1 and .2 above.
Where:
N = N1 + 2N2
N1 = number of persons for whom lifeboats are
provided
N2 = number of persons (including officers and
crew) the ship is permitted to carry in excess of N1
2.3 Where the conditions of service are such that
compliance with paragraph 2.2 above on the basis of N = N1 +
2N2 is impracticable and where the Administration considers
that a suitably reduced degree of hazard exists, a lesser value of N may be taken
but in no case less than N = N1 + N2.
2.4 For special purpose ships to which 2.2.1 applies, the
requirements of SOLAS regulations II-1/8 and II-1/8-1 and of
SOLAS chapter II-1, parts B-2, B-3 and B-4 should be applied as though the ship is a passenger ship and the special
personnel are passengers. However, SOLAS regulations
II-1/14 and II-1/18 are not applicable.
2.5 For special purpose ships to which 2.2.2 or 2.2.3
applies, except as provided in 2.6, the provisions of SOLAS chapter II-1,
parts B-2, B-3 and B-4 should be applied as though the ship is a cargo ship and the special
personnel are crew. However, SOLAS regulations
II-1/8 and
II-1/8-1 need not be applied and SOLAS regulations II-1/14
and II-1/18
are not applicable.