Suggest a correction

70MB(O) + 0.30MB(2.5)

OMB{O)

OMB(2.5)

mean outflow for 0 m tide condition; and mean outflow for minus 2.5 m tide condition, in m3 .

. 4 The mean outflow for side damage OMs shall be calculated as follows:

OMs

L Ps(!)Osul 1m3)

2687

BRUNEI DARUSSALAM GOVERNMENT GAZETTE where:

represents each oil fuel tank under consideration;

n total number of oil fuel tanks;

Ps(i)

the probability of penetrating oil fuel tank i from side damage, calculated in accordance with paragraph 11.6 of this regulation;

Os(i)

the outflow, in m3, from side damage to oil fuel tank i, which is assumed equal to the total volume in oil fuel tank i at 98% filling .

. 5 The mean outflow for bottom damage shall be calculated for each tidal condition as follows:

n

.1

OMB[O) L PBuJ~(I)~B{I) (m3)

where:

represents each oil fuel tank under consideration;

n the total number of oil fuel tanks;

PB(i)

the probability of penetrating oil tank i from bottom damage, calculated in accordance with paragraph 11.7 of this regulation;

the outflow from oil fuel tank i, in m3, calculated in accordance with paragraph 11.5.3 of this regulation;

and factor to account for oil capture as defined in paragraph 11.5.4 .

. 2

OMB(2.5)

where:

i, n, PB(i) and CDB(i)

as defined in subparagraph .1 above;

the outflow from oil fuel tank i, in m3

r after tidal change .

. 3 The oil outflow OB(i) for each oil fuel tank shall be calculated based on pressure balance principles, in accordance with the following assumptions:

.1

The ship shall be assumed stranded with zero trim and heel, with the stranded draught prior to tidal change equal to the partial load line draught dp.

2688

2689 9th. SEPTEMBER, 2008

.2 The oil fuel level after damage shall be calculated as follows:

hp where:

hp tc zi

Ps

Pn the height of the oil fuel surface above Z1, in m;

the tidal change, in m. Reductions in tide shall be expressed as negative values;

the height of the lowest point in the oil fuel tank above the baseline, in m;

density of seawater, to be taken as 1,025

kg/m3; and nominal density of the oil fuel, as defined in 11.2.3 .

. 3 The oil outflow OB(iJ for any tank bounding the bottom shell plating shall be taken not less than the following formula, but no more than the tank capacity:

where:

OB(iJ

=

Hw. A

Hw 1.0 m, when YB = 0

Hw

BB/50 but not greater than 0.4 m, when

YB is greater than BB 15 or 11.5 m, whichever is less

Hw is to be measured upwards from the midship flat bottom line. In the turn of the bilge area and at locations without a clearly defined turn of the bilge, Hw is to be measured from a line parallel to the midship flat bottom, as shown for distance h in Figure 1.

For YB values outboard BB 15 or 11.5 m, whichever is less, Hw is to be linearly interpolated.

the minimum value of YB over the length of the oil fuel tank, where at any given location, YB is the transverse distance between the side shell at waterline dB and the tank at or below waterline dB·

A the maximum horizontal projected area of the oil fuel tank up to the level of Hw from the bottom of the tank.

1 Hw= B:a ~~o but not prea!er than 0 ·W

Ccrller Line

BB/5 or 11.5 metres, whichever is less

(measured inboard from the ship's side at right angles to the centerline at the level dB)

Figure 3 Dimensions for calculation of the minimum oil outflow for the purpose of subparagraph 11.5.3.3

.4 In the case of bottom damage, a portion from the outflow from an oil fuel tank may be captured by non-oil compartments. This effect is approximated by application of the factor CnB(i) for each tank, which shall be taken as follows: