Yacht watch help
The watch is probably digital, but the other use for a bezel like that is that you can make your watch a compass. Aim the hour hand at the sun. South is now midway between the hour hand and 12. North is the other way. Set 0 on your bezel to north and you have a compass...well maybe more of a pelorous. If it doesn''t have any hands, guess you can guess pretty close where they would be!
I have a digital watch with a bezel like that and sometimes I''ll set it to the course I''m supposed to be on now or next, so I don''t forget.