No ship shall transit unless it is
a) propelled by motor power that is adequate in the opinion of an officer; and
b) marked and equipped in accordance with the requirements of sections 6 to 21.
Ships in excess of 1600 GRT must be equipped with:
Propeller Direction Alarm
a) propeller direction and shaft r.p.m. indicators located in the wheelhouse and the engine room; and
b) visible and audible wrong-way propeller direction alarms located in the wheelhouse and the engine room, unless the ship is fitted with a device which renders it impossible to operate engines against orders from the bridge telegraph.
Pitch Indicators and Alarms
a) a pitch indicator in the wheelhouse and the engine room; and
b) effective 1 April 1984, visible and audible pitch alarms in the wheelhouse and engine room to indicate wrong pitch.
a) a steering light located on the centerline at or near the stem of the ship and clearly visible from the helm; or
b) two steering lights located at equal distances either side of the centerline at the forepart of the ship and clearly visible fro the bridge along a line parallel to the keel.
Ships of 1,600 gross tonnage and upwards constructed before 1 September 1984 and all ships of 500 gross tonnage and upwards constructed on or after 1 September 1984 shll be fitted with indicators showing the rudder angle, the rate of revolution of each propeller and in addition, if fitted with variable pitch propellers or lateral thrust propellers, the pitch and operational mode of such propellers. All these indicators shall be readable fro the conning position.
Line handlers are available at the locks, but ships tying up at the approach walls have to place their own crew members ashore for line handling am must be fitted with landing booms suitably rigged on each side forward or, if not fitted, must use "Tie-up Service at Lock Approach Walls". See Seaway Notice available on the Internet Seaway Web page; http://www.greatlakes-seaway.com. Heaving lines which are to be used in the chamber of a lock may
Rope or rubber fenders are not permitted, because if they are lost and sink, they can foul the intakes.
Seaway Inspectors will survey the mooring arrangements prior to transit and advise on the precise requirements of Seaway Practices and Procedures.
The St. Lawrence Seaway Management Corporation will be pleased to review at no cost the plans of new buildings, as well as those of vessels arranging a first voyage. Plan packages should indicate "No Commercial Value" and be sent to -
The St. Lawrence Seaway Management Corporation
202 Pitt Street
Cornwall, Ontario Canada
All locks on the St. Lawrence Seaway can be filled or emptied in approximately 10 minutes.
Locks and Channels
There are seven locks in the St. Lawrence River, five in Canada and two in the United States. All locks are similar in size. The specifications are:-
Breast wall to ship arrester 233.48 m
Width 24.38 m
Depth over sills 9.14 m
Usable length 222.50 m
Usable width 23.16 m
St. Lambert 5 m
Cote Ste. Catherine 10.5 m
Lower Beauharnois 12 m
Upper Beauharnois 12 m
Snell 14.5 m
Eisenhower 12.5 m
Iroquois 0.10 - 2 m
The locks at the Welland Canal have the same controlling dimensions as those in the Montreal to Lake Ontario section. Locks 1 - 7 of the Welland Canal are lift locks; Lock No. 8 is essentially a guard lock. Locks No. 4, 5 & 6 are twinned and in flight.
The Welland Canal is 23.45 nautical miles long and overcomes a difference in the water elevation of 100 m between Lake Ontario and Lake Erie.
The controlling channel dimensions for the St. Lawrence Seaway (Montreal to Lake Erie) are:
- Minimum depth - 8.23 m
Width of channel
- When flanked by two embankments min. 68 m
- When flanked by one embankments min. 91 m
- In open reaches min. 137 m
International collision regulations are applicable on the Great Lakes.