This is how the towfish was rigged for towing aboard the M/V Northstar 4. The boom was secured centerline and the bungee was directed to the starboard side to create a Safe Zone and Danger Zone. The port side was the safe side. Since you are looking aft on the vessel, Port is the right side of the picture or the Left side of the ship. The setup is kind of complicated and was not without it's problems. |
This is the towfish. Obviously, this is the bottom...either that or Andreas is being eaten while we all stand around and watch! Oh...and it's raining...again. |
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Speaking of problems...if you look carefully, you will see that the cable is not where it should be. It has "jumped the sheave" or come out of its groove. You can see the cable is running over the center of the sheave rather than along the top where the groove is. Oops! Gotta hate when that happens! |
This is not our sheave...this one belongs to Williamson and Associates...but this is what we are doing to ours to prevent the cable from jumping again. Williamson used to have this problem, too. The difference between the two sheaves is that the Williamson sheave has the groove filled and machined to the cable diameter, has groove keepers and has swing arms to keep the sheave parallel to the cable. |
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No...this is not a problem! This is Jacqui working hard at the winch. She and Bob are running a CTD cast off of the Starboard side of the ship. We all took turns doing this...we ran well over 200 casts during our 18 days of research. |
