46 C.F.R. § 64.89 – Cargo pump unit.

(a) A cargo pump unit that fills or discharges a portable tank must be—
1. (1) Constructed of materials that are compatible with the product to be pumped; and
2. (2) Designed to be compatible with the hazard associated with the product to be pumped.
(b) The cargo pump power unit must be—
1. (1) Diesel;
2. (2) Hydraulic;
3. (3) Pneumatic; or
4. (4) Electric.
(c) The starting system for a cargo pump power unit must be designed to be compatible with the hazard associated with the product to be pumped.
(d) A diesel engine that is used to drive a cargo pump must have a spark arrestor on the exhaust system.