• For example...
  

The number of personnel (both watch-standing and 
non-watch-standing) on the bridge of the NOORDAM
between 2020 and the time of the collision may 
have raised the complacency level and lowered
the attentiveness of the bridge watch-standers 
with regards to maintaining a dedicated visual
and radar watch.' 

(Conclusion 5 from US Coast Guard Investigation
into the Circumstances Surrounding the Collision
Between the Passenger Vessel Noordam (NA) and
the Freight Vessel Mount Ymitos (MT),  1993.

• Collision as too many people on bridge.