A: 36.2 cm (14 1/4 in)
B: 15.9 cm (6 1/4 in)
C: 36.2 cm (14 1/4 in)
D: 17.8 cm (7 in)
E: 4.4 cm (1 3/4 in)
F: 5.7 cm (2 1/4 in)
G: 5.1 cm (2 in)
H: 2.5 cm (1 in)

Edson's Simplex Worm Steerer. Designed for the traditional cruising sailboat. There are three sizes available to suit boats from 22 ft (6.7 m) to 55 ft (16.8 m). Part No. 370 Worm Steerer is configured with the actual gear working on the aft side of the rudderpost. Size 00 requires a minimum of 141 /4 in (36.2 cm) and size 1 requires a minimum of 19 in (48.3 cm) of space aft of the rudderpost, which is shown a s the "C" dimension on the chart.