by Brent » August 2, 2010, 9:59 pm
The smaller 175 ft Tenders have Z Drives so hub seals are not an issue. The hub seal problem has been worse on the boat that break ice. This was a concern we had when we built them, but you can only tell people, you can't make them listen. This was a problem on the Coast Guard's two Polar Icebreakers in the beginning and it was solved and I am sure that somewhere down the road, a better seal will be designed that will eliminate this problem. It is definitely cheaper to have a diver replace the seals, but there may be other issues that need to be addressed in the drydock.
The smaller 175 ft Tenders have Z Drives so hub seals are not an issue. The hub seal problem has been worse on the boat that break ice. This was a concern we had when we built them, but you can only tell people, you can't make them listen. This was a problem on the Coast Guard's two Polar Icebreakers in the beginning and it was solved and I am sure that somewhere down the road, a better seal will be designed that will eliminate this problem. It is definitely cheaper to have a diver replace the seals, but there may be other issues that need to be addressed in the drydock.