Code of Federal Regulations Title 46. Shipping § 46.153.1126 Discharge of NLS residue from a slop tank to the sea:  Categories A, B, C, and D

(1) Through an NLS residue discharge system with the flow recording equipment required in § 153.481(b)(2) operating;  and

(2) At a rate maintained at or below Q in the following:

For tank contents that are miscible

For tank contents that are immiscible

Q = KU^1.4 L^1.6 x 10⁻⁵ m³/hr

where:

Q=maximum permissible slops discharge rate in cubic meters per hour.

V=volume of slops in the tank in cubic meters.

K=4.3, except K=6.45 if Q is distributed between two NLS residue discharge outlets on opposite sides of the ship (see §§ 153.470(c) and 153.481(b)).

U=ship's speed in knots.

L=ship's length in meters.

N=number of tanks containing Category B NLS residue pumped into the slop tank.