There are 2 ways to get there..
1. Go by car to Pasni and then rent a boat from there. Boat rent depends on the season.. if they are busy catching fish the rent will be 60000 to 80000 and if not a fishing season then the rent will be 20 to 40 thousand.
- Hire a boat from Karachi, it will cost you a lot.
There are no scuba facilities there.. Few are in Karachi, you can contact them for more info and rates.