COLREG Rule 9(a) is among the polices that govern navigation in confined waters: “A vessel proceeding together the training course of the slim channel or fairway shall keep as near to your outer limit on the channel or fairway which lies on her starboard side as is Secure and practicable”. https://bookmarkspedia.com/story958445/how-much-you-need-to-expect-you-ll-pay-for-a-good-security-guard-in-qatar