Question 1

With a simple sketch show a water tight automatic WT door operating gear

Accepted Answer

Sketch the sliding door with its hydraulic ram, diverter valves and hand pump: bridge signal moves oil, oil moves the door. Bridge or fire-control switch drives an oil diverter valve feeding a hydraulic ram on the door. Local manual diverter valve at the door works the same ram when nobody can reach the remote station. Lost system pressure still closes her through the local hand pump from either side. Remote position indicators plus open and closure alarms complete the sketch the surveyor wants. Surveyor follow-up: bridge orders close but she stays open — diverter, ram or indicators, and what do you move by hand?

Question 2

There is also a secondary control station, located above the bulkhead deck so that the powered watertight doors can be closed in the event that a fire or flooding prevents someone reaching them to operate the local contr

Accepted Answer

When fire or flood blocks the door, shut it from above: the secondary station over the bulkhead deck drives every power door. Secondary station sits above the bulkhead deck, clear of the flooded or burning compartment. From it every power sliding door closes remotely with alarms and indication repeating the bridge console. Handles stand at least 1.6 m above the deck on passenger ships with direction and open-shut marking. Bridge, local and secondary stations all drive the same diverter and ram — prove all three, not one. Surveyor follow-up: local station unreachable in smoke — bridge or secondary first, and what indication proves closure?

Question 3

Difference betn watertight and weather tight door

Accepted Answer

Watertight holds sea under head; weathertight sheds weather on deck — structure, gaskets and closing differ. Watertight doors sit in bulkheads below the waterline path, steel with clips and gaskets holding pressure both sides. Weathertight doors guard deckhouses on freeboard decks, secured tight from either side against spray and green seas. Watertight integrity is structural and tested; weathertight relies on Load Line closing appliances kept greased and dogged. Never prop either open at sea — one floods compartments, the other down-floods through deck openings. Surveyor follow-up: weathertight door dogged but daylight at the gasket — adjust, renew or sail, and what test proves it?

Question 4

Capacity of co2 bottle, hydraulic testing duration, testing pressure

Accepted Answer

One CO₂ bottle holds 45.4 kg: size the bank by protected volume, weigh for leakage, pressure-test cylinders near 228 bar. Hold needs 30% of the largest cargo-hold volume, machinery 35–40% of gross volume — bottles counted from 0.56 m³ per kg. Bottles ride near 56 bar at 20°C on wooden platforms with clamps, bursting discs near 177–200 bar. Weigh every two years for leakage with loss limits logged; blow through lines and prove release alarms. Hydraulic-test cylinders near 228 bar on schedule with stamp dates — undated bottles fail the room inspection. Surveyor follow-up: bank two bottles light with one test stamp expired — recharge, retest or sail short, and what now?

Question 5

Bro usne mere se poocha watertight door mei kis head tak water ko pass nahi hone deta) i don't know

Accepted Answer

The head is the head on the door’s own side: a watertight door holds the column of water that can stand against it in service. The requirement is that the door and its fittings shall withstand the head of water specified for the compartment it closes. On a bulkhead between two compartments, the specified head is normally the greater of the two draughts it separates, so it holds water from either side. The door is tested to that head in the gate test and proved by operating it with the tank filled to the required level. So the answer is not a fixed number on any door: it is the specified head for that compartment, and the index and the dogs are what hold it. Surveyor follow-up: WT door between a ballast tank and a hold tested to the lower head — which side governs?

Question 6

Water tight and weather tight doors and how to do pressure test and operated from where

Accepted Answer

Watertight doors are a flooding boundary; weathertight doors keep the weather out of a deckhouse — and each is operated and tested its own way. Watertight doors are hose tested in place, and those in passenger ships are tested under a head of water on both sides. They may be closed by hand at the door or from above the bulkhead deck, and large passenger installations close hydraulically from a central control. Weathertight doors are secured from either side, are steel, and are dogged rather than pressure-tight. A watertight door must be operable from the side the crew are in when the ship is upright and loaded — that is the test of it. Surveyor follow-up: watertight door that will not open from the forward side with a passenger list above — what is the rule?

Question 7

Watertight and weather tight door. Regulation

Accepted Answer

A watertight door has to close fast, show its position, and be operable where it stands — that is the whole regulation. A watertight door must be capable of being opened and closed quickly by one person, from either side, in an emergency. It must carry an index at the operating position showing whether the door is open or closed. It must be fitted with dogs or a clamping arrangement that holds it against the pressure from its side of the ship. And the door must be operable from the safer side, with any remote release arranged so it cannot be operated from a dangerous space. Surveyor follow-up: watertight door with no position indicator — is that a defect, or only a convenience?

Question 8

Weathertight /watertight (upto which head it doesn't allow water to pass

Accepted Answer

Watertight is a pressure rule, not a depth of water: a watertight door holds its side's head against a specified test head. A watertight door closes a compartment against a stated water head, normally the head it is required to withstand from its side of the ship. A weathertight door only prevents water entering from outside under normal sea conditions, and is not required to hold an internal head. So weathertight is about spray and green water, watertight is about a column of water inside the ship. That is why a watertight door needs dogs and an index, and a weathertight door needs only a closing arrangement. Surveyor follow-up: accommodation door specified weathertight forming a compartment — does that meet a watertight requirement?

Question 9

Where watertight door is located

Accepted Answer

Watertight doors sit in the watertight subdivision bulkheads — on the bulkhead deck, in accommodation and service spaces, and at tank boundaries. They are fitted in bulkheads forming the watertight subdivision, so their number and position are part of the ship’s approved plans. That means the bulkhead deck, the accommodation and service space boundaries, and the engine room casing. A watertight door is not a weathertight door: the first keeps the sea out, the second keeps the rain out. Their location and operation appear on the watertight arrangement plan, which the surveyor reads before he tests the door. Surveyor follow-up: door fitted in an accommodation bulkhead above the bulkhead deck — is that watertight, weathertight, or a conversion error?

Watertight / Weathertight Doors — Most Asked Questions