• Sifeba Products

    The NAV-AID RULE and the NAV-AID PLUS solve the most troublesome aspects of visual navigation, off-course heading corrections.

  • Sifeba Products

    The NAV-AID RULE and the NAV-AID PLUS solve the most troublesome aspects of visual navigation, off-course heading corrections.

  • Sifeba Products

    The NAV-AID RULE and the NAV-AID PLUS solve the most troublesome aspects of visual navigation, off-course heading corrections.

NAV AID Charts

sifeba NAV-AID


The NAV-AID RULE and the NAV-AID PLUS solve the most troublesome aspects of visual navigation, off-course heading corrections and unexpected diversions.

N AV-AID RULE and NAV-AID PLUS DESIGN PATENTS:- Australia 51271, Canada 245/30913, U.K. 936201, N.Z. 11461, U.S.A. 21627

The NAV-AID PLUS offers the extra benefit, at little extra cost, of two instruments in one. An in-built circular computer allows you to do your pre-flight and en-route calculations of ground speed, distance and time intervals without the need of another instrument.

The central circular slide rule enables the pilot to solve problems involving time, speed and distance. The triangular index, A positioned at the "60 minute" graduation on the rotating scale, is known as the SPEED INDEX The outer fixed scale is known as the MILE SCALE and the inner rotating scale the TIME SCALE.


NAV AID RULES

Nav-Aid Rules for WAC/SEC Charts

  • Off Course Heading Corrections
  • Distance flown and to fly
  • Diversion Heading Alteration
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NAV AID PLUS

Nav-AID Plus for WAC/SEC Charts

  • NAV-AID PLUS functions
  • Ground Speed Computer
  • Distance Computer
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