Atlantic Towing Ltd, the providers of harbour tug services in Halifax and Saint John, NB, periodically moves tugs between the two ports depending on the need. They have three tugs of 70 tonne bollard pull and 5400 bhp, the Atlantic Bear, Atlantic Beaver and Spitfire III that were designed with higher bows and extra fendering to work with LNG tankers at the Canaport monobuoy in the open roadstead off Saint John. With gas imports at a very low level now, one or two of the tugs have been shifted to work in Halifax where their power is useful for large container ships.
When a gas tanker or large crude tanker is due in Saint John, the tugs may be sent back from Halifax, and one of the other Saint John harbour tugs moves over to take its place in Halifax.
The Atlantic Beaver went to Saint John in recent days, the Atlantic Bear sailed today, and the Atlantic Cedar arrived from Saint John to supplement the three other regular Halifax tugs, Atlantic Fir and Atlantic Oak (5050 bhp 68 tonne bollard pull), and Atlantic Willow (4,000 bhp, 50 tonne bollard pull).
The Atlantic Cedar is also a 5050 bhp, 68 tonne bollard pull tug and it was soon put to work doing the same jobs that its sister Halifax tugs usually do.
That work included tethered stern escort for the arriving 113,509 gt / 119,180 dwt container ship CMA CGM Cochin. With a container capacity of 10,100 TEU it is about 5,000 TEU shy of the largest container ships to call in Halifax, but still requires the good power of three tugs to berth at PSA Halifax's Pier 42 - this case with the Atlantic Fir and Atlantic Oak.
Ships must be turned 180 degrees to tie up starboard side to, and tugs are required for slow speed steering assist, braking and the usual push pull. The stern tug keeps its line up, but moves to the port quarter and the offside tug (in this case Atlantic Oak) shifts to port midships for the actual berthing.
For comparison purposes the following file photo shows the additional fendering on the Atlantic Beaver:
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