air

airplane

airspace

alarm

alert

approaching

army

attack

battle

circle

computer

craft

danger

detecting

detector

digital

display

enemies

enemy

fi

fiction

flying

force

futuristic

hi

hud

incoming

interface

invading

invasion

map

military

monitor

navigation

nuclear

radar

scan

scanner

scannern

sci

science

screen

security

sight

sonar

spaceship

spotting

submarine

system

target

targeting

tech

technology

vision

war

warning