What are Ship (Marine) Battery Room Safeties and Maintenance carried out

Battery room inspection and maintenance:
Battery installation and its charging rectifier checked.
Battery room environment must be dry and well ventilated.
Battery tops shall be clean and dry, and terminal nuts must be tight and a smear of petroleum jelly applied to prevent corrosion.
Electrolyte at proper level, and shall have correct value of specific gravity by checking with a hydrometer.
Rubber gloves and goggles used when handling electrolyte.
Charging equipment checked for dirt, overheating, loose connection and correct functioning of indicators.
Ventilation arrangement for battery locker checked. Battery installation of both lead acid and alkaline needs good ventilation.
Since both type generates hydrogen gas during charging, no smoking and naked light allowed.
Steel works and decks adjacent to lead acid battery, should be painted with acid proof paint.
[For Cad-Ni cell, alkaline resistance paints.]
Battery Room Safety Arrangement:

Safety is provided by:
Proper ventilation
Prevention of heat source for ignition.

Ventilation:
Independent exhaust fan provided.
Inlet duct should be below battery level, and outlet at top of the compartment.
Prevention of heat source for ignition:
No naked light and no smoking.
Uses of externally fitted light or flameproof light.
Cables of adequate size and they are well connected.
Never placed Emergency Switchboard in this room.
Use insulated spanner and plastic jug for distilled water, to prevent short-circuit.
Room temperature, maintained at 15 ~ 25°C.