w60 and w80 optio have 28mm wide angle equivalent

which is 75degrees field of view i think and more than enough for a spin pole or mast top position. bigger field of view needed if you want to capture all the action from the mast base or a tramp position

earlier w series option not as wide

under 30mm good

new olympus　waterproof action cameras also 28mm i think

after field of view the next thing to check for is good video performance, for action stuff like cat sailing you need high frame rates like 30frames per sec at whatever size you think is adequate

go pro stuff very nice if you can afford it for pretty much single use. hardly the stuff you'll pull out of your pocket for kids birthday pics

spoilt for choice we are