For your own safety when diving in a drysuit you should leave your drysuit valve open, but close it a quarter turn from fully open to avoid any leaks. An open drysuit valve will then automatically vent if you ascend to let out the expanded air from your drysuit.
You can scuba dive when it’s raining if the rain isn’t part of a storm with strong winds that’s causing the sea state to be dangerous to dive and if the visibility hasn’t been badly affected above and below the water. If the rain is part of a storm and the winds are too much for diving you can’t dive.
When you are diving in a drysuit you still need a BCD to attach your scuba tank to your back and for buoyancy when you first enter the water.
It’s best to use your drysuit and not your BCD for buoyancy when diving in a drysuit, as it’s better to use only one air cell for buoyancy to have only one to vent on your ascent. If you use your BCD for buoyancy you’ll need to use both, as you’ll have to add air to your drysuit to avoid drysuit squeeze.
You can swim with whale sharks in the Galapagos Islands and the best time to go is from July to November. The best way to see whale sharks is from on a Galapagos scuba diving liveaboard on a trip to Wolf and Darwin Islands. Most Galapagos whale sharks are huge and some measuring up to 12 metres.
50 logged dives is recommended to scuba dive the Galapagos Islands. Most Galapagos scuba diving liveaboards have a minimum of 50 logged dives and PADI Advanced Open Water certification, as the conditions can be challenging due currents and surges, ocean swells, water temperatures and deep dives.