33 CFR § 401.10 - Mooring lines.
(a) Mooring lines shall:
(1) Be of a uniform thickness throughout their length;
(2) Have a diameter not greater than 28 mm for wire line and not greater than 64 mm for approved synthetic lines;
(3) Be fitted with a hand spliced eye or Flemish type mechanical spliced eye of not less than 2.4 m long for wire lines and 1.8 m long spliced eye for approved synthetic lines;
(4) Have sufficient strength to check the vessel; and
(5) Be arranged so that they may be led to either side of the vessel as required.
(6) Be certified and a test certificate for each mooring line containing information on breaking strength, material type, elongation and diameter shall be available onboard for inspection.
(b) Unless otherwise permitted by an officer, vessels greater than 200 m shall only use wire mooring lines with a breaking strength that complies with the minimum specifications set out in the table to this section shall be used for securing a vessel in lock chambers.
(c) Synthetic lines must be used for mooring at approach walls when using tie-up services at tie-up walls and docks within the Seaway.
(d) Notwithstanding paragraphs (a) through (c) of this section, nylon line is not permitted.
|Overall length of ships||Length of
|40 m or more but not more than 60 m||110 m||10 MT|
|More than 60 m but not more than 90 m||110 m||15 MT|
|More than 90 m but not more than 120 m||110 m||20 MT|
|More than 120 m but not more than 180 m||110 m||28 MT|
|More than 180 m but not more than 225.5 m||110 m||35 MT|