in a standard dive
they would
flank ahead on the surface to build speed
down on the planes
under they go
switch to electric motors
level dive at something like 25 metres
trim ballast for neutral bouancy
and use planes and screws
to return to periscope depth.
filling tanks to negative to go deeper yes.
with motors to go faster.
like when the say Blow negative.
choices are negative positive and neutral.
GWX has a minor positive bouancy pulling you up
slowly to about two metres above ordered depth
MM
