This mod is an addon to Terrafirmacraft adds a few completely new items to aid in underwater exploration while trying to stay true to the feeling of that mod.
If you already played the newer versiosn of Terrafirma, you may notice that finding early game metals goes in mainly two ways:
In order to make the second one more favorable, I decided to make a mod that allowed you to breathe underwater for just a bit longer, to scout for the deposits with more consistency. That ended up developing to this mod.
The first item you can build to help with underwater breathing is the Ceramic Blowpipe (used in TFC for glassblowing) by knapping and then firing it in a pit kiln. This item is not part of this mod, this mod just adds a new feature to it: holding it in your off hand while diving will allow you to dive in 2 blocks deep water while taking air from the surface.
All other items are made with brass or higher tiers of metals, and the helmets require the TFC glass lens to finish.
The Snorkel comes in brass, rose gold or sterling silver variants, and allows you to breathe up to 3 blocks deep, and frees your off-hand by being an helmet.
The Brass Diving Helmet is a much harder craft, but opens up the two last ways of breathing underwater: