Northrop Grumman Sperry Marine VisionMaster FT, Руководство пользователя

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Radar/Chart Radar User Guide Glossary
65900010 Glossary-3
(CPA) or time to closest point of approach (TCPA) are referenced.
Typically the CCRP is the conning position of the ship’s bridge.
CD ROM: Compact Disk Read-Only Memory.
Checksum: A numeric value used to verify the integrity of a block of data.
When data is transmitted from point to point in a packet, the
sending computer counts the bytes and adds a check digit at the
end of the packet. The receiving computer calculates the bytes
received and compares the sender's count with the receiver's count
to determine if there is any change that might indicate tampering
with the information.
CHS: Canadian Hydrographic Service
Clutter: Unwanted reflections on a radar screen, commonly from rain,
snow or sleet.
CM93v3: CMAP's proprietary and unofficial chart format .
COG: Course Over Ground
COLREG: Convention of the International Regulations for the Preventing
of Collisions at Sea.
Course-up (C UP): Stabilised display – the ship’s bearing is shown at the
top of the chart display with the North arrow pointing in the direction
of true north.
CP: Critical Points on a route.
CPA: Closest Point of Approach [to own ship]
CRT: Constant Radius Turn
CSE: CourSE [through water]
D
Datum: Any point, line, or surface used as a reference for a measurement
of another quantity.
DC: Digitized Chart. A data format for electronic charts that are made
using a digitizer device with paper navigational charts. On ships
equipped to make digitized charts, these charts can be used for
operating in areas for which electronic charts from official or