I tip each and every day. DMs and captains can change from day to the next and I want to ensure I don't inadvertantly miss someone. I usually give it (discretely if I can) to the DM, who I expect shares it with the captain.
I try and tip roughly 15% of the cost of the dive, but have gone higher if there has been exceptional service. For example, on a second dive, just as we were getting ready to enter the water, air started hissing from my first stage but we couldn't figure out from where. Because my reg is set up as it is (Air Source II plus air-integrated computer), it's not just a simple matter of giving me a spare reg. So DM got out his took kit, tried to switch over a bunch of bits and pieces but it still didn't work. Feeling sorry for the other divers on the boat waiting to start their dive, I said "don't worry, I'll just sit this one out". But in the meantime the captain had radioed to another boat and secured another first stage for me to use with the bits and pieces needed from my reg to do my dive. Then after the dive he put Humpty-Dumpty back together again so I could take into Javier for repairs.... who said an O-ring inside the first stage had blown. Fortunately he fixed it in time for me to make it back for my night dive! That day I tipped $25!
And when I dive with Living Underwater, in addition to the daily tips, I usually add something extra at the very end (which I hope the owner doesn't share) for the superior service provided above and below the water before, during and after the trip....things like pointing me to great, economical places to stay, advice on how to be a better diver, giving me a lift to or from the marina if I'm "on the way" etc. etc.
I try and tip roughly 15% of the cost of the dive, but have gone higher if there has been exceptional service. For example, on a second dive, just as we were getting ready to enter the water, air started hissing from my first stage but we couldn't figure out from where. Because my reg is set up as it is (Air Source II plus air-integrated computer), it's not just a simple matter of giving me a spare reg. So DM got out his took kit, tried to switch over a bunch of bits and pieces but it still didn't work. Feeling sorry for the other divers on the boat waiting to start their dive, I said "don't worry, I'll just sit this one out". But in the meantime the captain had radioed to another boat and secured another first stage for me to use with the bits and pieces needed from my reg to do my dive. Then after the dive he put Humpty-Dumpty back together again so I could take into Javier for repairs.... who said an O-ring inside the first stage had blown. Fortunately he fixed it in time for me to make it back for my night dive! That day I tipped $25!
And when I dive with Living Underwater, in addition to the daily tips, I usually add something extra at the very end (which I hope the owner doesn't share) for the superior service provided above and below the water before, during and after the trip....things like pointing me to great, economical places to stay, advice on how to be a better diver, giving me a lift to or from the marina if I'm "on the way" etc. etc.