Boresight SCAN mode.

[El Pilotto]

For some reason I am unable to engage boresight SCAN mode. Pressing the mode button on ACM panel does nothing. Missile remains in boresight mode. Can somebody help?

[Airhunter]

There is no such thing in the Tomcat. If you flip the ACM cover up you can launch the Phoenix in maddog along the ADL or use the ADL to get a Sidewinder lock. For boresight modes use PAL or PLM.

[El Pilotto]

I wasn’t precise, sorry. I am talking about AIM-9 SCAN mode.

[sLYFa]

Do you mean SEAM? Never heard of SCAN.

Edited June 5, 2019 by sLYFa

[Airhunter]

Yes, SEAM should be entered automatically when you select the AIM9, you can then cage the seeker using the SEAM/CAGE button on the throttle. Using boresight disables SEAM afaik and aims the seeker onto the ADL.

[VampireNZ]

From the manual....

 

The AIM-9G introduced a seeker head capable of the Sidewinder expanded acquisition mode (SEAM) and all later Sidewinders carried by the F-14 are also capable of that mode. The SEAM allows the missile seeker head to be uncaged to track a target within the seeker limits (40° from ADL) allowing the pilot to lead the target, improving missile performance. It also allows for the WCS on the F-14 to slave the seeker to a tracked target within 20° from ADL, allowing for off boresight acquisition.

 

The basic missile boresight mode without SEAM (no scan) is commanded by depressing the BRSIT (boresight) switch on the pilot ACM panel while not having the ACM mode active. In this mode the pilot puts the target at ADL and fires when the aural tone is present.

 

If the BRSIT switch is not used or the ACM mode is active the AIM-9 will use the SEAM and set the missile to use the double-D scan pattern. If a WCS target is present the seeker head will scan around the radar or TCS line of sight, otherwise the missile will scan around the ADL.

 

To enable lock-on to a target in SEAM the pilot depresses the CAGE/SEAM pushbutton on the left throttle. This illuminates the SEAM LOCK light on the ACM panel and uncages the seeker for 4.5 seconds and allows it to track a target present in the seeker field of view. If no IR sources is found the missile is again caged and the SEAM LOCK light is deactivated.

 

If lock-on is successful the aural tone will remain and the SEAM LOCK light stays illuminated allowing the pilot to launch the missile by pressing the stick trigger. After launch the next AIM-9 will automatically be selected.

 

 

Edited June 5, 2019 by VampireNZ

[Top Jockey]

There is no such thing in the Tomcat. If you flip the ACM cover up you can launch the Phoenix in maddog along the ADL or use the ADL to get a Sidewinder lock.

 

Wrong.

Regarding the AIM-9 employment modes in the F-14 A/B there's:

 

- Boresight Mode;

- Boresight SCAN Mode;

- Slave SCAN Mode (Radar or TV track);

 

Although the Boresight SCAN Mode can be visually misleading at the HUD.

Because the seekerhead symbol / piper keeps in a fixed position at the HUD (just like Boresight Mode)... however, the AIM-9 seekerhead will now be scanning in a wider area.

 

...I've discussed this in detail on a ton of threads along the forum, and some of this is also in the manual.

 

Yes, SEAM should be entered automatically when you select the AIM9, you can then cage the seeker using the SEAM/CAGE button on the throttle. Using boresight disables SEAM afaik and aims the seeker onto the ADL.

 

Actually, when you press the " CAGE/SEAM " button what you are ordering the system to do is: try to LOCK the seeker on target.

 

Also, using Boresight Mode doesn't disable SEAM... it disables: Boresight SCAN and Slave SCAN modes.

 

For boresight modes use PAL or PLM.

 

PAL and PLM pertain to Slave SCAN Mode because... those are Radar acquisition modes.