Non-integral keel cooler installations.

(a) Hull penetrations for non-integral keel cooler installations must be made through a cofferdam or at a sea chest. (b) Non-integral keel coolers must be suitably protected against damage from debris and grounding by recessing the unit into the hull or by the placement of protective guards. (c) Each non-integral keel cooler hull penetration must be equipped with a shutoff valve. [CGD 83-005, 51 FR 896, Jan. 9, 1986, as amended by USCG-2000-7790, 65 FR 58464, Sept. 29, 2000]