by Nighthunter » March 30, 2014, 9:39 am
The season of 70'/71', (the ice was thick) we spent 5 days (down and up) in the ice field w. of the Mackinaw Bridge to S. Chicago and the next load to Duluth was 7 days in Whitefish Bay ice, the return was the same.
The coast guard had one additional wind class ice breaker in the lakes that year (and used that practice in the 70's and early 80's) to help break ice in March and April.
At present, the ice is 4-5' thick with windrows 8-10' where the Munson and Calloway sit, that will be a though go of it. I'll bet this is thicker that in 70'/71' break-out.
Here are a few things to consider, in 1971, the largest ship was 75' wide, (most were 60') the old Mac was 75' wide. Now the new Mac is 60' wide and 65% the weight, she is escorting the Presque Isle (105'), Munson and Calloway (72') thru the ice plate which she cut a slot of 60', that places stress and pressure on the hull in which it was not designed for, it's like pushing a softball thru a baseball hole with the aid of a hammer.
Oh yes, in our ship convoy of 1971, one ships went into the ship yard for 30 days due to hull damage from the ice plate.
Good luck to all the ships this year, they will need it.
The season of 70'/71', (the ice was thick) we spent 5 days (down and up) in the ice field w. of the Mackinaw Bridge to S. Chicago and the next load to Duluth was 7 days in Whitefish Bay ice, the return was the same.
The coast guard had one additional wind class ice breaker in the lakes that year (and used that practice in the 70's and early 80's) to help break ice in March and April.
At present, the ice is 4-5' thick with windrows 8-10' where the Munson and Calloway sit, that will be a though go of it. I'll bet this is thicker that in 70'/71' break-out.
Here are a few things to consider, in 1971, the largest ship was 75' wide, (most were 60') the old Mac was 75' wide. Now the new Mac is 60' wide and 65% the weight, she is escorting the Presque Isle (105'), Munson and Calloway (72') thru the ice plate which she cut a slot of 60', that places stress and pressure on the hull in which it was not designed for, it's like pushing a softball thru a baseball hole with the aid of a hammer.
Oh yes, in our ship convoy of 1971, one ships went into the ship yard for 30 days due to hull damage from the ice plate.
Good luck to all the ships this year, they will need it.