ot: so how do a merchant ship and destroyer have a collision?

[firemanj92]

Originally Posted by eddief

but you'd think modern ships would have radar collision avoidance systems. or maybe in a great big ocean "mostly" no need.

A few years ago we had an large ship strike the Oakland/SF Bay bridge, something very stationary and in every nav chart plotter/chart for over 80 years. End result was pilot error-.