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Eng ID Term Definition
4501
saddle
A broad PASS or COL, resembling in shape a riding saddle in a RIDGE or between contiguous ELEVATIONS.
4502
safety aids
See AID TO NAVIGATION.
4503
safety fairway
An area within which permits are not granted for the erection of oil or gas related struc­tures. The use of a safety fairway is not usually ... more
An area within which permits are not granted for the erection of oil or gas related struc­tures. The use of a safety fairway is not usually mandatory, but is recommended.
4504
safety zone
The area around an offshore installation within which vessels are prohibited from entering without permission. Special regulations protect i... more
The area around an offshore installation within which vessels are prohibited from entering without permission. Special regulations protect in­stallations within a safety zone and vessels of all nationalities are required to respect the zone.
4505
SafetyNET
The international service for the broadcast and automatic reception of MARITIME SAFETY INFORMATION via the INMARSAT EGC system in waters whe... more
The international service for the broadcast and automatic reception of MARITIME SAFETY INFORMATION via the INMARSAT EGC system in waters where an international NAVTEX service is not provided.
4506
safe water mark
In the IALA Maritime Buoyage System a NAVIGATION MARK used to indicate that there is NAVIGABLE WATER around its POSITION with no known haza... more
In the IALA Maritime Buoyage System a NAVIGATION MARK used to indicate that there is NAVIGABLE WATER around its POSITION with no known hazards nearby.
4507
sag correction (tape)
See TAPE: SAG CORRECTION.
4508
sailing
A method of solving the various problems involv­ing COURSE, distance, DIFFERENCE OF LATITUDE, DIFFERENCE OF LONGITUDE and DEPAR­TURE. The va... more
A method of solving the various problems involv­ing COURSE, distance, DIFFERENCE OF LATITUDE, DIFFERENCE OF LONGITUDE and DEPAR­TURE. The various methods are collectively spoken of as 'the sailings'.
4509
sailing: composite
A modification of GREAT-CIRCLE SAILING used when it is desired to limit the highest LATITUDE.
4510
sailing: great circle
Any SAILING when a GREAT CIRCLE TRACK is involved.
4511
sailing: Mercator
A mathe­matical solution of the plot as made on a MERCATOR CHART. It is similar to PLANE SAILING, but uses MERIDIONAL DIFFERENCE and DIFFERE... more
A mathe­matical solution of the plot as made on a MERCATOR CHART. It is similar to PLANE SAILING, but uses MERIDIONAL DIFFERENCE and DIFFERENCE OF LONGITUDE in place of DIFFERENCE OF LATITUDE and DEPARTURE, respectively.
4512
sailing: meridian
Following a TRUE COURSE of 0° or 180°; SAILING along a MERIDIAN.
4513
sailing: middle-latitude
A method of converting DEPAR­TURE into DIFFERENCE OF LONGITUDE, or vice versa, when the true COURSE is not 90° or 270°, by assuming that suc... more
A method of converting DEPAR­TURE into DIFFERENCE OF LONGITUDE, or vice versa, when the true COURSE is not 90° or 270°, by assuming that such a COURSE is steered at the MIDDLE LATITUDE.
4514
sailing: parallel
A method of converting DEPARTURE into DIFFERENCE OF LONGITUDE, or vice versa, when the true COURSE is 90° or 270°.
4515
sailing: plane
A SAILING in which the EARTH or a small part of it is considered a plane.
4516
sailing: rhumb line
Any SAILING when a RHUMB LINE is involved.
4517
sailing: spherical
Any of the SAILINGS which consider the spherical or spheroidal shape of the EARTH.
4518
sailing: traverse
A method of determining the equiva­lent COURSE and distance made good by a craft follo­wing a TRACK consisting of a series of RHUMB LINES. T... more
A method of determining the equiva­lent COURSE and distance made good by a craft follo­wing a TRACK consisting of a series of RHUMB LINES. The problem is customarily solved by the principles of PLANE SAILING.
4519
sailing chart
See under CHART.
4520
sailing directions
Informa­tion published in book form describing COASTS, waters, CHANNELS, harbour facilities, etc., for use by mariners.