USS Ronald Reagan EDACS system

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SkipSanders

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Found and worked out another EDACS system, this one in 395-400 MHz. Again, MANY I-calls used, so that must be turned on to pick up much of the traffic.

USS Ronald Reagan
EDACS Standard System (Wide)

LCN 01 396.0375
LCN 02 396.1875
LCN 03 395.3375
LCN 04 395.5125
LCN 05 395.7125
LCN 06 397.0625
LCN 07 397.3125
LCN 08 397.4625 (Control)
LCN 09 397.6625
LCN 10 397.8125
LCN 11 399.2125
LCN 12 399.3625

As with most shipboard systems, signals are weak away from the ship.
 

ecps92

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Nice work again Skip, many of these Vessels have been eluding monitors for years, but as you know it only takes a little bit of time and using the SEARCH button to track them down... :D

Found and worked out another EDACS system, this one in 395-400 MHz. Again, MANY I-calls used, so that must be turned on to pick up much of the traffic.

USS Ronald Reagan
EDACS Standard System (Wide)

LCN 01 396.0375
LCN 02 396.1875
LCN 03 395.3375
LCN 04 395.5125
LCN 05 395.7125
LCN 06 397.0625
LCN 07 397.3125
LCN 08 397.4625 (Control)
LCN 09 397.6625
LCN 10 397.8125
LCN 11 399.2125
LCN 12 399.3625

As with most shipboard systems, signals are weak away from the ship.
 

SkipSanders

Silent Key
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To give an example of what I mean by 'weak away from the ship', I'm 250 feet up, looking 'down' onto San Diego Harbor from about 7 miles away, with a discone up 20 feet, low loss cable.

Signals from this ship, presumably line of sight, are 1, sometimes 2, bars on a 996XT signal meter.

Signals from other ships are even weaker.

The Carl Vinson is in port, and I can't even hear her system strong enough to ID it.

I expect these systems have no external antenna, probably depending on 'lossy coax' antennas threaded all through the ship's interior spaces, with MAYBE a bit of said coax strung outside the ship's 'Island', to cover the deck. Designed for low power, short range. The Navy doesn't like to have its ships lit up like christmas trees in RF, even when radio silence isn't in force.
 

SkipSanders

Silent Key
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WHOOPSIE, just realized I typoed the first two frequencies!

Should be:

LCN 01 395.0375 (Control)
LCN 02 395.1875
LCN 03 395.3375
LCN 04 395.5125
LCN 05 395.7125
LCN 06 397.0625
LCN 07 397.3125
LCN 08 397.4625 (Control)
LCN 09 397.6625
LCN 10 397.8125
LCN 11 399.2125
LCN 12 399.3625


Sooooory. Silly me!
 

Hooligan

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A confederate & I once determined an EDACS system in use by a USN ship docked, but the interesting thing was we found that their Marine security detail manning the entry control point & doing a roving patrol along the pier was using a standalone simplex channel for their ops. It wasn't due to range issues, as other parties on shore were using the Hydra system.
 
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