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PY-NNM020
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NM-2 16"

Standard Flying School Issue. Outside edges respectively read to 110 Nautical Miles in 1:500,000 and to 55 Nautical Miles in 1:250,000. Centre scale converts between Kilometres and Nautical Miles to 120 n.m.
PY-NNM010
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NM-1 10"

Recession & Sterling Discount
Convenient length (255mm x 38mm) for cockpit use. Outside edges respectively read to 70 Nautical Miles in 1:500,000 and to 35 Nautical Miles in 1:250,000. Centre scale converts between Kilometres and Nautical Miles to 75 Nautical Miles
PY-NKM010
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KM-1 14" (355mm x 38mm)

Opaque white Perspex scale with square edges. Printed on both sides with 4 outside edges reading to 97 Nautical Miles in 1:500,000 scale to 194 Nautical Miles in 1:100,000
PY-NCP020
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CPM-1 ETA Calculator

Calculate accurate ETA's with the CPM-1, usable at ground speeds from 50 to 140 knots and is so simple to use.
PY-NCT010
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CTP-1 Time Scale & Calculator

The CTP-1 is a handy Time Scale for rapid Groundspeed & ETA Calculations. Manufactured in white card 215mm x 70mm size. Sliding Scale measures distance flown in Nautical Miles, Statute Miles or Kilometres off 1:500,000 VFR Charts. Window then displays average Ground Speed in Knots, Miles per hour and kilometres per hour. Reverse incorporates Sliding Scale indications of Distance off Course and Degree of Error for Distance flown.