Navigation -- New Track Reference Technique

Stuck on the ground due to fog on the Isle of Man today, waiting to do an air-test on one of our Bulldogs (to bed-in its brand new engine), our test pilot Robert Miller (with 21,000 hours on non-airline military and civilian aircraft!) spent the afternoon in Costa's Coffee Castletown explaining the New Track Reference Technique for aerial navigation using map and compass. Here's his write-up.