Cold War Era "no GPS" in-flight alignment

[Muas]

Setting a mission date prior to 24th Setember 1993, will get the Hornet a POS/INS navigation mode, as there will be no GPS assistance.

Even if a full INS alignment is done on the ground, this will tend to degrade with time, raising navigation and computed weapon usage issues.

Under these circunstances, how can we update our position in flight? I read about TACAN updates, but information on this is scarse...

Anyone familiar with these procedures?

Thanks.

 

[razo+r]

"How to update the INS position during flight:

 

- Tacan update: tune into an tacan station available in the tacan database (HSI->DATA->TCN). Press UPDT on HSI and select TCN. You can then choose to select ACPT or RJT, when clicking accept the INS position is updated. Approx 30 feet accuracy. 

 

- Waypoint fix: target designate your waypoint and fly over it's position on the map. It must be easy to recognize from the airplane, for instance the end of a runway, a special building etc. Your hud or HMD will most likeley show the waypoint has drifted off the real position. Press DSG before you fly over the point and ACPT the moment you are right above it. INS is now updated accordingly. 

 

- AUTO and MAP function is not implemented"

From:

 

 

[Muas]

5 hours ago, razo+r said:

"How to update the INS position during flight:

 

- Tacan update: tune into an tacan station available in the tacan database (HSI->DATA->TCN). Press UPDT on HSI and select TCN. You can then choose to select ACPT or RJT, when clicking accept the INS position is updated. Approx 30 feet accuracy. 

 

- Waypoint fix: target designate your waypoint and fly over it's position on the map. It must be easy to recognize from the airplane, for instance the end of a runway, a special building etc. Your hud or HMD will most likeley show the waypoint has drifted off the real position. Press DSG before you fly over the point and ACPT the moment you are right above it. INS is now updated accordingly. 

 

- AUTO and MAP function is not implemented"

From:

 

 

Thanks, exactly what I was looking for. Specially the link to that thread, and and how to cure that CCIP drift.