46 CFR § 64.93
Pump controls
April 15, 2021
(a) A pressure gauge must be installed—
(1) On the pump discharge;
(2) Near the pump controls; and
(3) Visible to the operator.
(b) A pump must have a remote, quick acting, manual shutdown that is conspicuously labeled and located in an easily accessible area away from the pump. The quick acting, manual shutdown for remote operation must provide a means of stopping the pump power unit.