balsam holes

[canadianboy]

has anyone ever found a somewhat as i describe holew. i was trolling and the depth went from 16 feet to 42 feet suddenly and stayed at 42 feet for about 10 seconds then back to 16 i went up and down it many times with the same readings has anybody found this before? oh and it was in west bay

[Guest lundboy]

Yes, you can see these pretty easy with a paper chart of Balsam.