[Milsurplus] LO radiation

[Dan Arney]

My guess is that hydrophones/SONAR had far more effective range than the 
so called UNPROVEN LO DFing. The old Liberty ships probably had a very 
high acoustic signature even if they were trying to run silent as possible.
To DF subs are going to have to run surfaced or partly so. Even at 
periscope depth they leave a wake in the water and at night in most 
cases they would lay a phospercence (sp)wake.

In North Atlantic sea conditions, weather conditions would make 
navigation shaky at the best. DR, Celestial and sun lines the AP 
triangle would be on the order of 3-6 NM. Now go to full blown winter No 
Atlantic seas and my guess is the AP triangle is much greater than 10 NM.
Now lets add the RF noise to the picture with the sub on the surface in 
20 foot seas wind blowing and this poor slob trying to DF a LO  Hold 
your breath.

PROOF  PROOF  PROOF OF LO DFING !!!!!!!!

Hank
KN6DI

Even when I was flying and we were still carrying Stargazers as crew 
members we felt the in stable flight with the average stargazer that 
with two good 3 shot fixes we considered a 12 to 15 NM AP to be a good 
fix at jet speeds.
Now with INS/GPS systems X marks the spot.