On Wed, 17 Nov 2004 04:35:36 +0000 (UTC), David Snyder Hale
wrote:

hi,

I am taking a trip on a dive boat to Cocos Island off of Costa Rica.
I'm thinking about trying to bring an HF rig. What suggestions have
you for an antenna? It would have to fit into a reasonably "standard"
suitcase, or go as carry-on luggage, since packing space is limited.

dunno how big your boat is, but possibly a "tape-measure" dipole:

http://www.gotenna.com/

bob
k5qwg