(Pretty sure Robin is up on the ship above, not part of the diving crew. Let me know if it is different than that though.)

Ceesh awakes from his drunken stupor and manages to get into the water (somehow)

"Bombs awaaaaaaaay"

pllop

18 Acrobatics to get into ship

"Pardon me madam, it's been a while since I've slipped into such a small space."

HIC

Quote from Tesservett >>

Cass swims to where the hatch was on the other boats of this type, and examines it to see if we can get it open.  She will help anyone with an ability check for this.

 The hatch is the same as others you've encountered, but it seems to be locked from the inside now. From your examination, there seems to be two deadbolts on opposite sides holding the hatch in place.

Quote from Great_Axeblade >>

Quote from Tesservett >>

Cass swims to where the hatch was on the other boats of this type, and examines it to see if we can get it open.  She will help anyone with an ability check for this.

 The hatch is the same as others you've encountered, but it seems to be locked from the inside now. From your examination, there seems to be two deadbolts on opposite sides holding the hatch in place.

 Welp. Sonic Screwdriver won't help.

(We need tuna and his hammer!) 

(darn, he's gone)

I'm sure there are things other than hammers that would work

Could a Thunderwave work?

Could a Thunderwave work?

Quote from Fitz_Coulson >>

Could a Thunderwave work?

 "In addition, unsecured objects that are completely within the area of effect are automatically pushed 10 feet away from you by the spell's effect, and the spell emits a thunderous boom audible out to 300 feet."

(I think two deadbolts are as "secured" as something gets)

How about shatter

Quote from Tesservett >>

How about shatter

 Or Frostbite on the deadbolts and then a controlled blast to blow it inwards.

Gianna tries her thieves tools on the locks

lock 1 23

lock 2 16

Seeing the thieves tools- Cass uses guidance  to give a plus

3 to the first check and plus 3 to the second,  she gives a smile..

Quote from Wysperra >>

Gianna tries her thieves tools on the locks

lock 1 23

lock 2 16

 With Cass's Guidance helping her just enough to get them loose,  Gianna manages to unlatch the deadbolts and open the hatch. Under the hatch is some kind of magical barrier that keeps the water out and the air in, but lets you pass through into the room below. Just like the last two warships, there are three metal doors in this room.

(I'm back as well, just got the notifications that we were picking back up.)

perception check to see if he can get any information about what is behind the doors.

27

Quote from Grakus13 >>

(I'm back as well, just got the notifications that we were picking back up.)

perception check to see if he can get any information about what is behind the doors.

17

 Welcome back! 

The doors are solid steel, with a little peephole in the middle. Through each door, you see a hallway.

Tuna say  "We probably need to find the engine room and disable it. That's how we forced the others to the surface if I remember correctly."  If there are no objections Tuna will try and quietly open one of the doors that he remembers heading towards the engine room on the last ship.

Stealth 15

And thieves tools if it is locked 12

“Aye!  To the engine room- should be towards the stern.  Once it’s disabled mayhap we can gets em to surrender”. Cass says quietly.  She  helps tuna (giving another roll). And uses guidance for 1 bonus..

Quote from Grakus13 >>

Tuna say  "We probably need to find the engine room and disable it. That's how we forced the others to the surface if I remember correctly."  If there are no objections Tuna will try and quietly open one of the doors that he remembers heading towards the engine room on the last ship.

Stealth 22

And thieves tools if it is locked 8

 The door is unlocked, and you sneak to the end of the hall. There is a rumbling coming from the door just as before.