Board Flashcards
(408 cards)
Solar Cycle
11 year cycle which has a 4 year rise and 7 year decline
Van Allen Radiation Belts
2 concentric, donut shaped regions of stable, trapped charged particles that exist because the geomagnetic field near the earth is strong and field lines are closed
Atmospheric Drag
Affects low orbiting objects, less than 1000 km. Energy deposited in the earth’s upper atmosphere by charged particle bombardment heats the atmosphere, causing it to expand outward over a period of time.
Geosynchronous Orbit
Satellite with an average altitude of approximately 19,300 nautical miles. Satellite rotates once around earth in as long as it takes for earth to rotate around once
FSM
Fleet SIPR Messaging System. Point to point connection between ship and NOC. Faster, more reliable record message traffic delivery to ships.
MUA
Master Update Authority. NCTAMS PAC. The single point for directory updates.
What is RI
Routing Indicators. GENSER RI’s, Begin with the letter R and are seven characters in length
What is OSRI
Originating Station Routing Indicator. Ships derive by using the first 4 letters of the routing indicator of the Fleet NARC assigned to the servicing NCTAMS/NCTS system to which they will transmit, suffixed by FRI assigned to the fleet/mobile unit
What is NARC
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FRI
Fleet Routing Indicator. Three letter designator assigned to the fleet/mobile unit
FL 1
Start of Message and Sequence Number
FL 2
Routing Indicator
FL 4
Security Label
FL 5
DTG
FL 6
Originator
FL 7
Action Address
FL 8
Info Address
FL 9
Exempt Address
FL 11
Break
FL 12
Text
FL 13
Break
FL 14
Confirmation
FL 15
End of message validation
ZBZ
Corrupt