Thanks for the comments...
I think Cal is right... I should have just slowed more than I did or stopped. With the chop in the channel I was just trying maintain headway speed..
What the MP yelled to me was, I was more than headway speed within 150... He didn't "pull me over".
What was unnerving was I started the slight turn to port to stay more than 150 from the 34'.. and saw this small boat coming right at me from 300-400 ' at high speed.. that was the MP.. (I didn't know it at the time.)
Lesson Learned....
Thanks to all