Missile Guidance - LOBL-only missiles exhibit LOAL behaviour

[co-smo]

Mods (complete and add to the following information):

• Arma 3: 2.18.152405 [e.g. 1.00 stable, rc, dev]
• CBA: 3.18.1 [e.g. 3.0.0 stable, commit hash]
• ACE3: 3.19.0 [e.g. 3.0.0 stable, commit hash]

Description:
Missiles that are supposed to be LOBL only (AIM-9J Sidewinder, FIM-92F Stinger etc) can exhibit LOAL behaviour, tracking targets without first locking on.

Steps to reproduce:
Follow this flowchart!

1. Load ACE missile that is LOBL-only (ie. FIM-92 Stinger)
2. Fire in the direction of an air target without locking on to it
3. Missile exits launcher, then steers and tracks towards a self-identified target with no input from the user

Expected behavior:
Missiles that are supposed to be LOBL only exit the launcher and if a target is not locked onto prior to firing the missile, it flies in a straight trajectory without steering, and does not acquire targets during flight.

Where did the issue occur?

• Editor (Singleplayer), Editor (Multiplayer)

Log Files:
[- Link to (gist or pastebin) to the client and/or server RPT file. An instruction to find your RPT files can be found here.](https://pastebin.com/crjL3ad8)

Additional context:
Missiles perform as expected when locking on to targets; issue exists solely when not locking onto targets.

Screenshots:

[TheCandianVendingMachine]

this was intentional behaviour; i couldn't find any documentation which said that these missiles were only LOBL. if there is any, please do share and it'll be changed

[PabstMirror]

stingers seem to be lobl-only (except for some new vehicle based datalink variants)
I've been playing adding a locking system for manpads, maybe draft in a week

[TheCandianVendingMachine]

so my only issue with the sources that say that (for AIM-9 at least) is that they all say that 9xb2 added LOAL capabilities in regards to locking into a specific target.

i don’t know what pre launch commands are sent to the missile, but i can rationalize the seeker being spun up and activated, and if it leaves the tube then it will lock onto the strongest source: as if it were launched with a lock. but then again, safety features could disable the seeker

regardless, in my opinion, unless a SME or documentation can claim otherwise I think that this is an ambiguous feature

tangent: i’m excited to see a locking feature! it was something i wanted for a while but didn’t want to make pre-launch logic for every case

[co-smo]

Section 6-4 of FM 44-18-1 seems to agree with the idea that pre-92K Stingers are LOBL-only; manual makes clear reference to the fact that "you must have IR acquisition lock-on for all targets before you can fire at them."

[TheCandianVendingMachine]

Remember, you must have IR acquisition
lock-on for all targets before you can fire at
them

[PabstMirror]

stinger - #10830