Are particularly useful in submarines because they enable long journeys to be made underwater or under icecaps with reduced possibilities of collision.
check
center
carry
carried
carefully
built
build
bring boat
slight
slip
slope
soap
solar
species
spin
stiff
swung
tales
thumb
treated
tune
University
vapor
vessels
wealth
silly
shout
shallow
shaking
shake
selection
scared
satisfied
satellites
sale
rush
rubbed
rocky