BOP is a generic term fo rthe hull configuration of several similar ships, the same as D'rel refers to various hulls constructed to a set design formula.
In TOS the Romulan warship is refered to as a "Warbird", as are the Romulan heavy cruisers in TNG.
The Klingons are prety conservative with starship designs, being a poor economy, and will milk a hull type, one it has proved viable, for as many applications and roles as they can. They also have a "Waste not, wnat not" ethos with old hulls.
Would the Klingons develop a BOP based light tactical tug?? Of course they would, especially with older and obstelete versions. (Picture MP busy rattling off a BOP LTT complete with pod!!

)
Actually, having atmospheric capabilities, a BOP commando "Dust Off" frigate would be a pretty good applictation. Hmmmm, a D12G....
