Change the rule navigation to:

A vessel has a number of movement points, and is either cumbersome or not cumbersome, defaulting to not cumbersome.

Vessels have a square, which is tracked on the chart.

Vessels have a Facing; a Vessel’s Facing is either North (N), East (E), South (S) or West (W).
East and West are each other’s opposites, North and South are each other’s opposites.

A valid move by a vessel consists of a list of atomic steps whose costs sum to less than the vessel’s movement points.

Cruising is an atomic step costing 1. Cruising moves a vessel from the square they are in to an orthogonally adjacent Square in the direction of that vessel’s facing. Cruising may be denoted with a “C”.

Rotating is an atomic step costing 1 if the vessel is cumbersome and 0 if it is not. Rotating changes the facing of a vessel to a facing that is not the opposite of its current facing. Rotating may be denoted by the First Letter of the new facing.

Add to the end of the paragraph in Fleets starting with “Battleships”:

Battleships are cumbersome and have 3 movement points

Add to the end of the paragraph in Fleets starting with “Submarines”:

Submarines are not cumbersome and have 3 movement points

If Maritime Inaction has not passed change:

As a Maritime action, a Captain may send the Admiral a private message listing the square their Vessel/s moves to, their Vessel/s’s facing, and the square/s their Vessel/s shoot at.

to:

As a Maritime action, a Captain may send the Admiral a private message listing at most one valid move for each of their vessels, and the square/s their Vessel/s shoot at.

If Maritime Inaction has passed:

remove each bullet point in the rule “The watch” that starts with “Move”.

Add a bullet point to list in “The Watch”:

*Make a valid Move with a vessel they control.