Question to David about Alternatives to gas based ballast system

[Das Boot]

I believe this is the shortest answer Dave has ever given.

[redboat219]

Was asking He Who Shall Not Be Named if he ever made, either something he was experimenting on or as a commission work a WTC that did not utilize gas (Propel/ Snort) to surface like a piston tank, water pump like OTW, R&R, RCShipyard and others.

He said nope.

[Albacore 569]

Nope..........

Agreed Nope. An example is the standard OTW dive units do not use gas or need gas or atmospheric air from the surface.

Dive Systems – OTW Designs

[He Who Shall Not Be Named]

David,

All of your subdriver rely on a gas, either pressurized propane/butane or atmospheric air sucked in through a snorkel mast or or a hybrid of both, for surfacing.

Have you ever explored using other systems, like pumps or pistons?

Thanks

Nope..........

[RCSubGuy]

https://www.rc-submarine.com/rc-submarine-technology

[redboat219]

David,

All of your subdriver rely on a gas, either pressurized propane/butane or atmospheric air sucked in through a snorkel mast or or a hybrid of both, for surfacing.

Have you ever explored using other systems, like pumps or pistons?

Thanks