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Eng ID Term Definition
2461
initial great circle direction
INITIAL GREAT CIRCLE COURSE.
2462
initial meridian
See MERIDIAN.
2463
initial point
The ORIGIN of a system in the rectan­gular system of SURVEYS of which a PRINCIPAL MERIDIAN and a BASE LINE constitute the axes for a given ... more
The ORIGIN of a system in the rectan­gular system of SURVEYS of which a PRINCIPAL MERIDIAN and a BASE LINE constitute the axes for a given area. Also called fundamental point.
2464
inland ice sheet
An ICE SHEET of considerable thick­ness and more than about 50,000 sq. km in area, re­sting on ROCK. Inland ice sheets near SEA LEVEL may ... more
An ICE SHEET of considerable thick­ness and more than about 50,000 sq. km in area, re­sting on ROCK. Inland ice sheets near SEA LEVEL may merge into ICE SHELVES.
2465
inlet
A narrow opening by which the water penetrates into the LAND.
2466
Inmarsat
A company providing mobile satellite communications. The only company (2011) providing services within the GMDSS.
2467
Inmarsat-C
The digital satellite communications system for store-and-forward text or data messaging using mobile terminals with omni-directional antenn... more
The digital satellite communications system for store-and-forward text or data messaging using mobile terminals with omni-directional antennas. Inmarsat-C is the only system (2011) that allows ships to meet the majority of the satellite communication requirements of the GMDSS including distress alerting, reception of MARITIME SAFETY INFORMATION and general communications.
2468
inner harbour
See under HARBOUR.
2469
inner neat line
See NEAT LINE.
2470
innocent passage
Navigation through certain sea areas of a coastal State without being prejudicial to the peace, good order or security of that State. See al... more
Navigation through certain sea areas of a coastal State without being prejudicial to the peace, good order or security of that State. See also TRANSIT PASSAGE.
2471
inogen light
Leading mark based on the interference effect of 3 separately placed rasterboards. An arrow pointing in the direction of the line is display... more
Leading mark based on the interference effect of 3 separately placed rasterboards. An arrow pointing in the direction of the line is displayed when not sailing along the leading line.
2472
input
What is put in, as electric current or other power put into a machine. DATA to be transferred from an external storage medi­um, such as pun... more
What is put in, as electric current or other power put into a machine. DATA to be transferred from an external storage medi­um, such as punched cards, into the internal STORAGE of a COMPUTER.
2473
input impedance
The complex opposition to alternating current between the input terminals of any device.
2474
inset
In CARTOGRAPHY: a) a small area outside the NEAT LINES of a MAP or CHART included within the NEAT LINES or borders to avoid publishing a sep... more
In CARTOGRAPHY: a) a small area outside the NEAT LINES of a MAP or CHART included within the NEAT LINES or borders to avoid publishing a separate gra­phic of the small area alone; b) a representation of a small area on a larger SCALE (e.g., town-plan inset), or of a large area at a smaller SCALE (e.g., orientati­on inset); c) any information, not normally appearing within the geogra­phic limits of a MAP, which has been enclosed by border lines and included within the map neat lines. Insets are always placed in areas where important features will not be obs­cured.
2475
inshore
(adj. and adv.). Near or towards the SHORE.
2476
inshore traffic zone
A ROUTEING measure comprising a designated area between the landward boundary of a TRAFFIC SEPARATION SCHEME and the adjacent COAST, to be ... more
A ROUTEING measure comprising a designated area between the landward boundary of a TRAFFIC SEPARATION SCHEME and the adjacent COAST, to be used in accordance with the provisions of rule 10(d), as amended, of the International Regulations for Preventing Collisions at Sea , 1972 (Collision Regulations).
2477
insolation
Amount of direct solar RADIATION incident per unit horizontal area at a given level. Downward-directed solar RADIATION (global RADIATION).
2478
instability
Property of the state of rest or continu­ous movement of a system such that any disturbance intro­duced into this state grows. In METEOROL... more
Property of the state of rest or continu­ous movement of a system such that any disturbance intro­duced into this state grows. In METEOROLOGY, the term is often used as a synonym of STATIC INSTABILI­TY.
2479
instability: static
State of hydrostatic equilibrium of the ATMOSPHERE in which a particle of air moved from its initial level undergoes a hydrostatic force whi... more
State of hydrostatic equilibrium of the ATMOSPHERE in which a particle of air moved from its initial level undergoes a hydrostatic force which tends to remove it further from this level. Also called hydrostatic instability.
2480
installation: offshore
Man-made structure usually built for the exploration or exploitation of marine resour­ces, marine scientific research, tide observations, e... more
Man-made structure usually built for the exploration or exploitation of marine resour­ces, marine scientific research, tide observations, etc.