The scary, practical reason the navy is once again teaching celestial navigation

mapuc · 02-12-16, 04:55 PM

Up to the end of the 90s
A cadet In the Swedish navy, had to learned it the old way and he or she is not graduated before they can their stuff and first then they moved up to learn about modern navigation.

Markus

XabbaRus · 02-13-16, 09:58 AM

It's not hard to jam a GPS signal. You can easily make a simple one with stuff from a local electronics store. The signals are quite weak.

ikalugin · 02-13-16, 11:00 AM

Depends on the receiver type. Military receivers require either multiple jammers or an extremely powerful one to achieve effects at reasonable range.

XabbaRus · 02-14-16, 01:16 PM

Yea I was meaning one that could screw up things like phones etc. The principle is quite simple. Definitely with in the means of the Iranians if they wanted to spoof a GPS.

ikalugin · 02-14-16, 05:15 PM

Civilian GPS - yes. Military - no. Military grade receivers use a phazed array receiver and other such measures, meaning that you need 7-14 20kw jammers or 1 3Mw jammer to get effects at good ranges (ie over 100km).

02-13-16, 09:58 AM	#2
XabbaRus Navy Seal Join Date: Sep 2001 Posts: 5,330 Downloads: 5 Uploads: 0	It's not hard to jam a GPS signal. You can easily make a simple one with stuff from a local electronics store. The signals are quite weak. __________________

02-13-16, 11:00 AM	#3
ikalugin Ocean Warrior Join Date: Aug 2014 Location: Moscow, Russia Posts: 3,212 Downloads: 8 Uploads: 0	Depends on the receiver type. Military receivers require either multiple jammers or an extremely powerful one to achieve effects at reasonable range. __________________ Grumpy as always.

02-14-16, 01:16 PM	#4
XabbaRus Navy Seal Join Date: Sep 2001 Posts: 5,330 Downloads: 5 Uploads: 0	Yea I was meaning one that could screw up things like phones etc. The principle is quite simple. Definitely with in the means of the Iranians if they wanted to spoof a GPS. __________________

02-14-16, 05:15 PM	#5
ikalugin Ocean Warrior Join Date: Aug 2014 Location: Moscow, Russia Posts: 3,212 Downloads: 8 Uploads: 0	Civilian GPS - yes. Military - no. Military grade receivers use a phazed array receiver and other such measures, meaning that you need 7-14 20kw jammers or 1 3Mw jammer to get effects at good ranges (ie over 100km). __________________ Grumpy as always.

02-12-16, 04:55 PM	#1
mapuc CINC Pacific Fleet Join Date: Sep 2003 Location: Denmark Posts: 20,545 Downloads: 37 Uploads: 0	Up to the end of the 90s A cadet In the Swedish navy, had to learned it the old way and he or she is not graduated before they can their stuff and first then they moved up to learn about modern navigation. Markus