The OV - 10B was an OV - 10A with no weapons , no sponsons , and a glass dome replacing the rear door , which was used by the tow operator .
This is an ex-Luftwaffe B - model originally used as an aerial gunnery target tug .
The model     was an model     with no weapons , no sponsons , and a glass dome replacing the rear door , which was used by the tow operator .
This is an ex-Luftwaffe B - model originally used as an aerial gunnery target tug .