Narrowly

Four miles an hour, and not a minute sooner.

Building the cut…
WS throttle ahead / astern
AD steer the tiller
Space engine to neutral
E work the lock  ·  F moor up
C camera  ·  B key card  ·  H help
Left thumb steers, right thumb throttles
Buttons for the lock, mooring, camera and pause
Drag anywhere else on the water to look around

Turn her sideways — a narrowboat steers better in landscape.