I looked around but could not find the thread where kayak compasses were discussed, so I have started a new thread. (I have no relation to Amazon.com other than the fact that I purchase some things there.

Inexpensive Kayak Compass w/ Good Reviews at Amazon:

http://www.amazon.com/dp/B001HYKD8M/ref=dra_a_cs_mr_hn_it_P1400_1000?tag=dradis-20