...The Harder They FallG 20

For this achievement you will need to destroy the 24 Surveillance Airships found throughout Solís. The ones you need to desteoy become available when you secure regions and will show up on your map as a yellow diamond with an airship in it. If you're working towards discovering every location in the game (white icons on map) you'll eventually find them all. Destroying them will be a requirement towards completing whichever location it is in. You'll frequently see the blue (sometimes black) slow flying airships during your gameplay however, destroying the random ones will not count towards this achievement, only the ones that are shown on your map when your nearby the town or region. Destroying them is simple and can be done in a number of ways. The best way I found to take them down quickly was by using one of the RPG's, that way it be done from the ground, or using a weaponized helicopter. If you don't have a rocket launcher on you or have not yet unlocked it or a helicopter to be supply dropped, you can take them down by flying any aircraft into it, with your grappling hook, or by flying it yourself and crashing it. Early on in the game that was my go to method for a few of them. Just use your grappling hook along trees, buildings, mountains, etc. Along with the wingsuit and parachute to get you to an altitude where you are close enough to grapple onto the ship and enter it. The controls are simple, RT to ascend, LT to descend, and foward with the left joystick to accelerate. Just fly low enough at top speed and crash into anything, jump out, and BOOM, one down.