What is the "rule of thirds" for fuel on a passage?

One third to get there, one third to get back, one third in reserve

One third for the engine, two thirds for heating and charging

Top up whenever a third of the tank has gone

Fill the tank only one third full, to save weight

A gale is forecast from seaward, as shown, and you want a port of refuge. Which harbour is the better choice?

B: a sheltered entrance with deep water at any state of tide

A: the bar will break up the waves before they reach you

A: the wind will blow you straight in

Neither: a harbour is never a refuge in a gale

Day Skipper Quiz

3 picture questions, each answer explained.