For geometry purposes, how should an airborne rotary-wing laser platform be treated?

• A. Ground-based laser
• B. Air-based laser
• C. Sea-based laser
• D. Space-based laser

Answer: (A)

In geometry problems like this, you simplify by projecting all positions onto the ground plane and using a common ground reference. An airborne rotary-wing laser platform is used to designate targets on the ground, so for the math you treat its coordinates as if it were on the ground. This lets you work in a 2D ground-frame (north/east or similar) and use ground range and azimuth to the target without juggling altitude. If you kept the altitude, you’d have to handle slant range and 3D geometry, which isn’t needed for these problems.

So, for geometry purposes, the airborne laser platform is treated as ground-based. The other options would require accounting for altitude or a different reference frame, adding unnecessary complexity for the task at hand.