Section 150.340 - What are the rules of navigation for tankers in the safety zone or area to be avoided?(a) A tanker must enter or depart the port's safety zone or area to be avoided in accordance with the navigation procedures in the port's approved operations manual as described in § 150.15(i) of this part.(b) A tanker must not anchor in the safety zone or area to be avoided, except in a designated anchorage area.(c) A tanker may not enter a safety zone or area to be avoided in which another tanker is present, unless it has been cleared by the person in charge of the port and no other tankers are underway.(d) A tanker must not operate, anchor, or moor in any area of the safety zone or area to be avoided in which the net under keel clearance would be less than 5 feet.USCG-1998-3884, 71 FR 57651, Sept. 29, 2006, as amended by USCG-2013-0397, 78 FR 39182, July 1, 2013