Altitude: —

Mark the sun Enter latitude on chart Close (B)

The sea rolls her. Hold the brass arm on the sun and Mark when the ring fills. A true fix needs the noon sun.

Knots counted: 0.0

Heave the log Enter in reckoning Close (L)

Cast the log astern and watch the glass. The instant the last sand falls, cry NIP! — the knots counted are your speed.

Swing the lead (hold) By the mark! Close (F)

Hold the button to swing the lead, and let go at the top. When the line falls slack, the lead has struck — call the mark quick, before she drifts.

Record