FAR 91.113d Question.

Hello-

I have a quick question/concern regarding FAR 91.113d. I pretty much
grasp the concept well. Basically apply the acronym BGAAR (baloons,
gliders, airships, airplanes and helo's). For example, If I am flying
my Cessna and a balloon is about 2 mi ahead of me I will alter course
to the right and give it the ROW. Likewise for any of the other items
on that list except, helo's, right?

Well in the event that I come across a vessel that is not listed in
91.113d, what do I do? Yesterday I was flying and a Rombulan Warbird
decloaked and was dead ahead of me. I tried to hail him but I had no
luck. Since he was traveling at impulse power I was able to maneuver
around him. There was no wake turbulence or anything of that sort.

Although starships are not included in 91.113d, I typically just give
them the right away. Its easy on planet earth since we are in
Federation airspace, all federation vessels are not cloaked and tend
to travel at impulse power. I am concerned about the Rombulan Warbird
however.

What should I do in this case especially if I cannot hail the
Warbird?