The Elk. It is possible to dive the Elk upto 1 hour after the chart slack water has finished on spring tides
Hilsea Point. It is possible to dive Hilsea Point 1 our before the chart slack water. There is a bit of surface current, but it is slack at the bottom.
How long does it take to…?
Leave campsite and be ready with boats launched and kit and divers in boat: 90 mins
Get to dive site, shot the site and get divers in the water off Club boat: 30 mins
Put a boat load of divers (6 divers) into water and finish diving 90—120 mins (assuming 30—45 min dives and 2 waves as 2 have to stay on the boat)
Have lunch, refuel boat and change bottles: 60—80 mins