I'll always have a spotter with me and the pool has at least two lifeguards at all times.
Rudy, as someone that did weekly pool practice before the pool closed for maintenance . . .
1 - as was said -- YOU are responsible for planning and diving safely. No one else.
2 - Educate the lifeguards. Brief them and your surface support before the dive. "Today I'm going to do hovering practice, so if I sit still in one place for several minutes, don't worry unless the bubbles don't come up regularly.
3- Make a plan on how they contact YOU -- Our pool requires everyone out if lightening is near. The guards will flash the pool lights for me to come up. Arrange a safe place to come up. Alternative - someone drops a soft weight (SOFT WEIGHT - don't damage the pool!) in your line of sight. Hopefully not on you.
4 - Be courteous. Don't surface in the way of a swimmer. If you find things, turn them in to the lifeguards.
5 - Put boots on your tanks -- think "no damage to the pool". Just a small chip goes a long way to permanent damage to divers' reputations.
6 - Be aware of special risks in a pool. Danglies can get caught in pool filter grates . . . which happen to be a nice landmark for doing helicopter turns, or aid in a straight reverse kick line.
. . . . Practice situational awareness by knowing where swimmers are
at all times. Coming up under a swimmer is bad juju!
7 - Be courteous - when someone comes up and tells you about the bubbles tickling and they didn't know you were down there,
first express apologetically, "I hope I didn't alarm you!" A caviler laugh-it-off attitude can cause the swimmers to cop an attitude, while solicitous responses do make it a fun tale to tell.
8 - Know that you are a representative of the sport to people who haven't seen diving before. Take a little time to chat and encourage . . . and if you like your LDS, lay a few of their business cards down with your gear.