DICTIONARY OF

Making Iron 214 Manilla Hemp
Making Iron. Rather large caulking iron used for final hardening
up of oakum when caulking a seam.
Making Way. Moving ahead or astern through the water. See
Under Way.
Malinger. To feign illness to avoid work.
Mallet. Small maul.
Mallock's Rolling Indicator. Instrument for indicating amplitude of roll of a vessel.
Consists of a circular box in which a paddle-wheel is mounted in jewelled bearings and
immersed in liquid, on a vertical bulkhead. As ship rolls, paddle-wheel maintains an attached
and graduated scale in true horizontal. A vertical line on glass face of box indicates amount
of roll.
Malone CO2 Indicator. Instrument that measures CO2 content of air, as a percentage, by
automatically weighing unit volume of air against unit volume of air mixed with CO2.
Mammatocumulus. Cumulus cloud with udder-shaped projections downward from lower
edge.
Mammatus. Udder-shaped cloud form.
Man. To provide with men, or manpower.
Managing Owner. Shipowner who actively controls, the commercial affairs of his ship or
ships.
Manavalins. Seaman's word for 'odds and ends'.
Manganese. Black oxide of manganese sometimes found on seabed when sounding.
Manger. Space, on cable deck, between hawse pipes and thwart-ship breakwater in vessel
where cable deck is below forecastle deck.
Mangrove. Tropical tree, or shrub, that covers large areas of coast in tropics. Seed
germinates on trees and send roots down to the water. Wood is straight-grained, elastic and
hard; often used for boat and shipbuilding.
Manhelper. Paint brush fastened to a long wooden pole.
Man-Harness Hitch. Put in a rope when dragging or towing by manpower. Large 'half
crown' is made in rope and laid across it; bight on one side of rope is taken under the rope
and through the other bight.
Manhole. Perforation in a boiler shell, tank top or other enclosed space, to allow a man to
enter. As this usually demands the smallest possible removal of metal, the opening is
approximately the shape of a man's transverse section, this shape allowing the covering
piece to be inserted from outside.
Manifest. Document given to Master when cargo is shipped. Contains particulars of cargo,
shipper's name, marks and numbers, quantities, where loaded. Master's name, ship's name,
tonnage and port of registry.
Manifold. Group of valves for pump suctions and deliveries. Small compartment in which
such valves are placed.
Manilla Hemp. Product of a species of banana, principally from Philippine Islands.
Manilla Rope 215 Margin Plate
Manilla Rope. Made from manilla hemp. Contains natural oil, so does not need tarring. Is
about three-quarter weight of hemp rope of same size, and has a higher breaking point.
Manning Scale. Statutory scale (1936) specifying minimum number of efficient deck hands