Ensuring Placement of fixtures LAT/ LONG Over Water - How?

Hi, I’m building a fixture that is out at Sea - approximately 3 miles out in
the water of the English Channel. I Create a New Project - it’s all good.
There we are - approx over the site. How do I ascertain the EXACT GPS Co-
ordinates of the primary structures. Thanks, in advance, Will

Hello. Check the Scenery Editor gizmo tool, it has settable latitude,
longitude and altitude parameters
Regards, Sylvain