Money, as well as absolute power, corrupts. Dive masters should never be tipped since they are in the business for the love of diving. Instructors, on the other hand, are in the business to make money and should always be tipped. If the instructor somehow kills your spouse or your children, I would reduce the tip somewhat.
Should you have an experience while diving with a divemaster that you feel calls for a tip, find the nearest instructor and have him/her handle the potentially sticky situation. You are diving for fun and should not have to worry about fiduciary matters.
I have been in MANY circumstances where people came up to me not knowing how to deal with this. I simply had them hand over whatever largesse they wished to share and I dealt with the situation. Any instructor will do the same for you.
Should you have an experience while diving with a divemaster that you feel calls for a tip, find the nearest instructor and have him/her handle the potentially sticky situation. You are diving for fun and should not have to worry about fiduciary matters.
I have been in MANY circumstances where people came up to me not knowing how to deal with this. I simply had them hand over whatever largesse they wished to share and I dealt with the situation. Any instructor will do the same for you.