Ironically, submarines are safer
on the surface in deep water as
the tsunami will pass harmlessly
underneath. According to our
simulations submarines in port
have a slightly better chance of
survival than surface ships.  Of
primary importance to the
admiral are transports, ships
with communications facilities,
the ability to rescue other ships,
and helicopter support facilities.
Of course, everyone's morale
would be improved were
frigates to be clearly visible
flying the flag as opposed to
damaged on the beach, sunk in
the harbor so as to block access
to docks, or flotsam drifting in
the Straits.  We assume the
admiral would commandeer all
tugboats and fireboats.
Of concern would be refueling and re-provisioning the fleet if shore
facilities are not accessible.