Hong Kong Regulations

MERCHANT SHIPPING (INSTRUCTIONS TO SURVEYORS) (PASSENGER SHIPS) REGULATIONS - REGULATION 11

Criterion of service

(1) For a ship of given length the appropriate factor of subdivision shall be
determined by the Criterion of Service Numeral

(hereinafter called the Criterion Numeral) as given by the following formulae
where- Cs = the Criterion Numeral; L = length of the ship, as defined in
paragraph 6(2); M = the volume of the machinery space, as defined in paragraph
6(11); with the addition thereto of the volume of any permanent oil fuel
bunkers which may be situated above the inner bottom and before (or abaft) the
machinery space; P = the whole volume of the passenger spaces below the margin
line, as defined in paragraph 6(12); V = the whole volume of the ship below
the margin line; N = number of passengers for which the ship is to be
certified; and P1 = .6LN where .6L represents the specific volume per
passenger in cubic feet for criterion purposes. (Where, however, it is shown
to the satisfaction of the Principal Surveyor of Ships that the value of .6LN
is greater than the sum of P and the whole volume of the actual passenger
spaces above the margin line, the lower figure may be taken provided that the
value of P1 used is not less than .4LN). When P1 is greater than P M + 2P1 Cs
= 72 __________________
...........................................................................
........... (iii) V + P1 - P and in other cases

M + 2P Cs = 72 __________________
...........................................................................
........... (iv) V

(2) Limiting Values of Criterion Numeral-

   (a)  Values of Cs less than 23 shall be taken as 23 and

   (b)  Values of Cs greater than 123 shall be taken as 123.

   (c)  For the purposes of paragraph 12(2) and 12(3)

4691 - 10L S = ___________________ 17

(3) For ships not having a continuous bulkhead deck, the volumes are to be
taken up to the actual margin lines used in determining the floodable 
lengths.