Dumb question about the vanilla Arma 3 and DLCs

The SDAR actually can mount optics but it's disabled config wise.

The Rahim can't mount side attachments (I think) because it's disabled, and the Zafir / M320 LRR can't mount suppressors unless you re-enable the proxies with a mod.

1. The underwater rifle can't use any attachments. You can always carry a regular rifle on your back while diving. You could give underwater rifles to one or two divers on the team for protection, and have the rest carry normal weapons.

EDIT: You can fire normal rifles while swimming on the surface as long as you are using a scuba suite or the survival suit, and the muzzle is not close to the water. You may not be able to shoot horizontally at something on the same level as you, but no problem with something slightly above you.

2. You can't really give exact bearings and range from the drone with respect to something on the ground, only the drone itself, but you can give rough directions and distance, like "enemies, north west, medium". If you can also give some simple reference point, like "left (from the friendlies' point of view) of an old stone house", that can help a lot. If you can find on the map where the friendlies and the enemies are, you can give better indications. The compass on the sensors mfd can help you get rough bearings.

3. Unfortunately no, you can't have more than one person using an UAV at a time. You can still make a route in the UAV terminal map and it will follow it while you use the turret, and you can easily take control with the scrollwheel.

There's quite a bit more on waypoints and how uavs are controlled from the terminal map.

Also, a little advice for when you are using UAVs and other vehicles with several optics modes (normal, night vision, thermal): thermals can pick hot spots easily, but are crap when trying to actually identify terrain features, buildings, and what gear is someone carrying. Don't stick to just thermals when using UAVs and other sights.

Ive never tried attachment on it. I dont see why you wouldnt be able to use sights on it. (Its railed)

Try double clicking on your map on the enemy location after you find them. Just make sure you are in side channel. It will create a map marker your team can see.

I dont think you can. To be honest though i recommend learning how to use the drones autonomous features. The falcon does very well on a seek and destroy order. As long as its supporting (not being the main assult force, thats not what its for) it should hold up pretty well

1. Probably not, but one way to find out is in the Arsenal. Select the rifle and then you can see if any attachments are available/compatible.

2. Again not sure since I'm not on my PC, but the crosshair should be outputting the 6 digit map coordinates they are aimed at. Or at worse, the HUD will have the coordinates of the drone's position.

3. I've actually never tried this and I'm also interested to see if it's a possibility.

1. the range on the underwater weapon is 30 meters...(pretty much your sight underwater also) you wont need a sight for that.
2. Drones give a 6 digit gps coord that can be checked on the botom left side of the hud. You can also use shift + T if the spoting is enabled on the dificulty.
3. No , this is an game engine limitation unfortunately.

With the drone one, if it's night time you can just use the laser to say where the enemy is, and then just say to your teammates to look for the laser