33 CFR § 401.42 - Passing hand lines.
(a) At locks, hand lines shall be secured to the mooring lines and passed as follows:
(1) A downbound vessel shall use its own hand lines, secured to the eye at the end of the mooring lines, by means of a bowline, which hand lines shall be passed to the linehandlers at the lock as soon as the vessel passes the open gates;
(2) Hand lines shall be passed to upbound vessels by the linehandlers as soon as the vessel passes the open gates, and secured, by means of a clove hitch, to the mooring lines 60 cm behind the splice of the eye;
(3) At Iroquois Lock and Lock 8, Welland Canal, both upbound and downbound vessels shall use their own hand lines as provided in paragraph (a)(1) of this section; and
(4) Upbound vessels of overall length in excess of 218 m in Locks 4 and 5, Welland Canal, shall secure the hand lien to the eye of the No. 1 mooring wire by means of a bowline.
(b) Mooring lines shall not be passed over the side of a vessel in a manner dangerous to a lock crew.