Assume the mortar is located on a boat and travelling through this sort of environment in predawn without sonar equipment to prevent grounding.
The boat would need to make sudden turns and stops without more than a few seconds warning.
The mortar crew also cannot see the target area although do have a general idea of it's location (as they should anyway).
Only a handful of rounds are available but an FO is on hand with an unobstructed view of the target area.
Given those details, how likely is it for even one round to strike the target zone?
