Choose the first letter of the word sought or type the word you are searching for in the field above.
- maiden voyage
- the first voyage of a new ship after taking delivery from the ship builder and placed in regular service
- main deck
- the continuous deck that extends between the forward and after ends of a ship
- main engine
- generally refers to the propulsion diesel engine that propels a ship
- manhole
- an opening in an enclosed compartment or boiler fitted with a cover through which a man can enter for inspection
- manifest
- a document listing the cargo or passenger carried on a ship; contains cargo details ships particulars masters name etc.
- manifold
- group of valves placed together side by side; the valves may share a single cast body divided into several compartments for individual piping
- manilla rope
- a rope made of manilla hemp which contains natural oil
- manometer
- an instrument for measuring gas pressure
- margin line
- line drawn parallel to and not less than 3 inches below the upper surface of bulkhead deck at the ship side; it defines the highest permissible location on the ship side of any damage waterplane in the final condition of sinkage trim and heel
- margin plate
- plating forming the side of double bottom
- marine insurance broker
- one who acts as an intermediary between shipowner and underwriter; he acts for the assured and his commission is deducted from the premium paid by the assured to the insurer
- mariner
- in general a person working onboard a sea-going ship
- marine surveyor
- one who inspects ships to assess monitor and report on the condition of the ship her machinery and cargo; depending on the type of survey carried out the evaluation requirements may be statutory class marine insurance etc.
- marline spike
- a hand-held iron pin for opening up the strands of a rope when splicing; it is tapered to a point at one end
- mast
- a vertical pole made of steel pipe erected perpendicular to the keel in the centreline of a ship; it serves to carry derricks; supports navigation light signal light etc at certain height
- master
- the officer in command of a merchant ship; also known as captain
- master mariner
- the deck officer holding a masters certificate in a merchant ship; he is qualified to command a ship
- mate
- deck officer assisting a master; there may be several officers such as Chief Officer Second Officer or Third Officer in a merchant ship
- Material of Build
- All vessels are built of steel unless otherwise indicated by the following codes:
- mates receipt
- document signed by the mate of a ship acknowledging receipt of the stated cargo on board
- mean draught
- the average of forward and aft draughts of a ship
- messenger
- small diameter rope attached to a heavier rope such as towing line to facilitate heaving
- metacentre
- a theoretical point when dealing with ship stability for small angle of inclination from upright position; consider a floating ship heeling to a small angle the centre of buoyancy B will shift towards the newly immersed side to B1 and the vertical line of force through this new centre of buoyancy B1 will intersect the original line of force when the ship is upright at M known as metacentre
- metacentric height
- the distance from the centre of gravity of a ship to the metacentre; it is considered positive if the metacentre lies above centre of gravity
- midship
- in or near the middle of a ship; same as amidships
- mini-bulker
- a smaller sized bulk carrier of about 3000 tons deadweight
- monkey island
- navigating and compass position on top of the wheel house
- monkeys fist
- the weighed down knot at the end of a heaving line
- monsoon
- persistent wind blowing mainly in China Sea and Indian Ocean; direction of wind reverses depending on season and may be accompanied by heavy rain especially during summer
- moon pool
- a large opening through the deck and bottom plating of a ship for special operational requirement e.g. drilling
- mooring
- securing a vessel to a buoy or strong point ashore e.g. bitt by ropes; at anchorage by dropping anchor
- mother ship
- deepsea vessel which carries cargo transhipped from feeder ships; as such it calls only at selected major ports which have higher cargo volume
- motor tanker
- refers to any self-propelled tanker i.e. tanker fitted with diesel engine for propulsion; commonly abbreviated as MT
- motor vessel
- refers to any self-propelled vessel i.e. vessel fitted with diesel engine for propulsion; commonly abbreviated as MV
- mould
- of shipbuilding the template from which a member of a ships structure is shaped
- mould loft
- a large sheltered space in a shipyard for laying off full-size templates or moulds of the hull structural components from the construction plans
- multimeter
- a multi-purpose instrument for measuring electric current in ampere volt and ohm; it is a combination of ammeter voltmeter and ohmmeter into one
- multimodal transport
- describes a shipment having more than one mode of transport which may not necessarily include an ocean voyage
- multipurpose ship
- ship designed to carry several types of cargo either as one full cargo or in combination e.g. ore/oil carrier ro-ro/container ship passenger/vehicle carrier etc.
- muster
- to assemble at a pre-determined location
