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How do submarines determine where they are and how they measure how far away something is?
Wiki User
∙ 10y ago
Submarines have several ways of determining position by navigation:
1. Satellite - GPS - All Submarines have GPS receivers aboard that can help pinpoint their position to within feet on the planet.
2. Electronic Inertial Navigation - Electronic Gyroscope systems maintain a continous plot of where the boat is.
3. Chart Position/Dead Reckoning - the Dead Reckoning plot keeps position under a navigational chart of the area. While not a perfect position, it's better than nothing if everything else isn't working.
4. Radar - Only when used within range of land.
5. Visual - Used primarily when entering port, via sight of landmarks, buoys, etc., matched against a chart of the area.
All submarines use active and passive Sonar to determine target range, though active is more reliable. Passive Sonar requires ship directional course changes and plotting to determine range. Active Sonar works both ways though; use it and you give away your position.
Wiki User
∙ 10y ago
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