Glossary Flashcards
Knot
1 nautical mph
Nautical mile
Travelling 1’ of latitude (e.g. if you travel 60nm north or south, your latitude will change by 1 full degree)
Mercator projection
The most common map projection, created by wrapping a cylindar of paper around a globe; this shows compass directions correctly but distorts sizing
Admiralty charts
Offical charts created by hydrographic bodies; their use is required under SOLAS
Neap tides
Least extreme tidal ranges (when the sun’s and moon’s gravitational pull is at a right angle to one another)
Spring tides
Most extreme tidal ranges (when the sun and moon’s gravity pulls together) - happens ~2x a month
Tide tables
Published times/depths of tides, used to calculate when vessels can enter ports without running aground
Enclosed docks
Basins cut into the land sealed by docks; used to control water depths avoiding tidal constraints
Locks
Short sections of waterway wirh watertight gates at each end (sluice gates); used to control the depth of water, e.g. when entering enclosed docks or lifting ships over higher ground in calal systems
Flights
A series of locks
Tropical storms
High winds/rough sea conditions frequent in tropical climates at certain times of year; hurricanes (USG/Caribs, June-Nov), typhoons (FE, May-Dec), cyclones (Indian Ocean, mid/end year)
Hurricane
Tropical storms in the USG/Caribs, seasonally June-Nov with Aug-Oct most extreme
Typhoons
Tropical storms in the FE, seasonally May-Dec with Jul-Sep most extreme
Cyclones
Tropical storms in the Indian Ocean, seasonally middle/end of year depending on location
Willy-willies/Williwaws
Tropical storms/cyclones reaching NW Aus
Beaufort wind scale
Describes the state of the sea at varying wind strengths
Ice breakers
Vessels designed to break through ice in ports, most common in northern hemisphere timber ports (Scandinavia, Russia) - may be nuclear powered
Comparitive advantage
One country can export a commodity comparitively cheaper than another; key factors are land (usually static; natural factors, such as climate, geography, physical avalibility in the case of natural resources), labour (avalibility, efficency and cost), capital (things driven by money, e.g. infrastructure developments, equipment - linked to labour as higher skilled labour can lead to greater technilogical advancements re: machinery etc) and entiprise (willingness to take risk, can also be driven by policy e.g. subsidies)
Absolute advantage
One country possesses a commodity in an exportable quantity whereas another has none
Liners
A shipping sector that trades basis a set schedule of ports/dates/times (usually a specific day of the week per port) and at a published rate of freight/rules of carriage
Tramps
Dry bulk cargo ships that trade wherever they can find cargoes (the oppisite of liners)
Charterer
Entity employing a ship; could be the actual importer or exporter, or may be a trader acting between them
Principles
The shipowner and charterer involved in a specific fixture
Charterer’s broker
Arranges fixtures, not to be confused with charterer’s agent