But for less than a dozen dives in my life, I was a tipp-ee, rather than tipp-er, so I have a different perspective than most. On every boat/trip I've ever worked, not me or anyone i worked with cared one iota whether we got pesos or dollars, or if it was wet or dry. Just hand over that fat cash, bro!! 
Also, as mentioned above, always tip daily, because crew members can get screwed out of their share for numerous reasons.
Another point, I recommend handing money to all crew seperately, or at the very least, make SURE the rest of the crew sees you handing it to the captain or DM, and even then, tell someone how much it was. It was quite common for whomever was given the cash, to stick it in his pocket and never mention it, if he could get away with it.
It was also very common for captains or shop owners to bless themselves with a larger cut than everybody else.
Also, any time some tourist said, "oh, 'll take care of you guys at end of the trip", that always got a discreet eyeroll and a knowing look between the crew, because what this almost always means is the guy is gonna cheap-out on us, maybe hand us a whole, big, giant $20 bill, after a week of waiting for him to arrive (late) to the pier, then lugging around extra weight that he always insisted he didn't need (but did), and sharing air with him at the safety stops, because his flailing, air-hogging, out-of-shape, self couldn't dive his way out of a wet paper bag !! And then he wants to give each crewman/DM a miserable $2 a day ?!!!!?
WHEW !!! Good times !!

Also, as mentioned above, always tip daily, because crew members can get screwed out of their share for numerous reasons.
Another point, I recommend handing money to all crew seperately, or at the very least, make SURE the rest of the crew sees you handing it to the captain or DM, and even then, tell someone how much it was. It was quite common for whomever was given the cash, to stick it in his pocket and never mention it, if he could get away with it.
It was also very common for captains or shop owners to bless themselves with a larger cut than everybody else.
Also, any time some tourist said, "oh, 'll take care of you guys at end of the trip", that always got a discreet eyeroll and a knowing look between the crew, because what this almost always means is the guy is gonna cheap-out on us, maybe hand us a whole, big, giant $20 bill, after a week of waiting for him to arrive (late) to the pier, then lugging around extra weight that he always insisted he didn't need (but did), and sharing air with him at the safety stops, because his flailing, air-hogging, out-of-shape, self couldn't dive his way out of a wet paper bag !! And then he wants to give each crewman/DM a miserable $2 a day ?!!!!?

WHEW !!! Good times !!
