They are actually a Schottel type that is now out of production. If
the project ever gets funded, we'll have to go back to Schottel's.
Efficiency is low but the operational advantages outweigh that, even
for a ship like this that used them for long periods on scientific
station.

This is a diesel electric vessel so can divert an enormous amount of
power the thrusters. In this case, they also double as propulsion
devices in areas where there are marine mammals, divers, or sensitive
bottom habitat.

--

Roger Long



"Evan Gatehouse" wrote in message
...
otnmbrd wrote:
"Roger Long" wrote in message
news

Put these factors together with a boat shallow enough that it's
going to be able to go fast enough to lift its bow very much and
lifting the thruster clear of the water to reduce drag becomes
petty improbable.

How do you like these thrusters?

http://home.maine.rr.com/rlma/D124-7.PDF



All retractable?

Nope. Probably Schottel or Gill Pump Jets. 360 degree thrust in
shallow water.

Rather poor efficiency though.

Evan Gatehouse