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BUY $ 15.00 AUD NAV - AID RULE FOR WAC
BUY $ 15.00 AUD NAV - AID RULE FOR SEC /VNC
BUY $ 20.00 AUD NAV - AID PLUS FOR WAC
BUY $ 20.00 AUD NAV - AID PLUS FOR SEC/VNC
PILOT NAVIGATION AIDS

Sifeba Products

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

Easy And Quick

No need for 1:60 rules or computers!
The NAV-AID RULE accomplishes the task quickly and easily.


PILOT NAVIGATION AIDS

NAV-AID RULE
NAV-AID PLUS
DESIGN PATENTS

Australia 51271, Canada 245/30913, U.K. 936201, N.Z. 11461, U.S.A. 21627

Extra Benefit, At little Extra Cost

The NAV-AID PLUS offers the extra benefit,
at little extra cost, of two instruments in one.


General Aviation Plotters

Authorised Dealers, Full Warranties and Back up Service

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

Contact Us : info@sifeba.com | Mobile : 0402 054 144

Location / Address : Unit 3/82 Coventry Street, Southbank, VIC. 3006. Australia

Introduction

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.

Each NAV-AID has for convenience one defined distance scale either WAC 1:1,000,000 or Sectional 1:500,000. No multiple scales to cause confusion - we are all aware of Murphy's Law.

THE NAV-AID RULE has been constructed from a special synthetic material of such thickness and flexibility to allow it to be bent without permanent distortion or breakage.


Three Simple Steps

Place the centre point of the base-line over the present position

Align the base-line with the departure point or last fix.

Using the radials read off the number of degrees to alter present heading to fly direct to destination.

Today’s technology has given us the G.P.S. but V.F.R. still requires visual navigation as the primary method. The NAV-AID RULE or NAV-AID PLUS and Aeronautical chart is all you should require with the comfort that track corrections or diversions are easily taken care of.

NAV AID RULES

NAUTICAL MILES O - 160 (OR 0 - 80): This scale is for use with world Aeronautical charts 1:000,000 (OR 1:500,000) and enables the direct reading of distance in nautical miles.

RADIALS0-45: These radiate from either side of the centre of the baseline, at 5' intervals to 45",and are used to determine the alteration to a heading to fly direct to destination from an off course "fix". It supersedes the 1 in 60 method.

ARCS 80 - 0 - 80 n.m (OR 40 - 0 - 40).: These bisect the RADIALS at intervals and are used to determine the distance flown and distance to fly from an en route "fix".

EXAMPLE: The intended track was from A (Broken Hill)to B (Tibooburra) a distance of 156 n.m. A "fix" was obtained at c (Lake Buncannia) right of intended track.
METHOD: To determine alteration to heading to fly direct to B, distance flown A to C and distance to fly C to B.

from $15.00
1 Place the centre of the base-line over the "fix" C, with the base-line connected to the place of setting heading A.
2 Note the RADIAL intercepting B. In this case by interpolating the 10" RADIAL. Therefore, the alteration to the present heading to fly direct to B (Tibooburra) is 10" LEFT. Without moving the RULE from the above position.
3 The distance flown A to C, along the base-line, using the ARCS and interpolating is 74 n.m.
4 The distance to fly C to B, along the 10" RADIAL, again using the ARCS and interpolating is 82 n.m

lf in the above example the "fix" had been LEFT of intended track then it would have been necessary to reverse the RULE and have the base-line to the LEFT.

TO DETERMINE TRACK ERROR: The track error is determined by placing the RULE with the centre of the base-line OVER THE Position oF SETTING HEADING and the base-line along intended track. The RADIAL which intercepts the "fix", interpolating if necessary, is the track error. In the above example the track error is 6'.

THE NAV-AID RULE has been constructed from a special synthetic material of such thickness and flexibility to allow it to be bent without permanent distortion or breakage.

NAV AID PLUS

NAUTICAL MILES O - 160 (OR 0 - 80): This scale is for use with world Aeronautical charts 1:000,000 (OR 1:500,000) and enables the direct reading of distance in nautical miles.

RADIALS0-45: These radiate from either side of the centre of the baseline, at 5' intervals to 45",and are used to determine the alteration to a heading to fly direct to destination from an off course "fix". It supersedes the 1 in 60 method.

ARCS 80 - 0 - 80 n.m (OR 40 - 0 - 40).: These bisect the RADIALS at intervals and are used to determine the distance flown and distance to fly from an en route "fix".

EXAMPLE: The intended track was from A (Wyngan) to B (Lightning Ridge) a distance of 132 n.m. A "fix" was obtained at C (Carinda) right of intended track.
METHOD: To determine alteration to heading to fly direct to B, distance flown A to C and distance to flY C to B.

from $20.00
1 Place the centre of the base-line over the "fix" C, with the base-line connected to the place of setting heading A.
2 Note the RADIAL intercepting B. In this case by interpolating the 8" RADIAL. Therefore, the alteration to the present heading to fly direct to B (Lrghtning Ridgg) is 8" LEFT. Without moving the RULE from the above position:
3 The distance flown A to C, along the base-line, using the ARCS and interpolating is 70 n.m.
4 The distance to fly C to B, along the 8" RADIAL, again using the ARCS and interpolating is 62 n.m.

lf in the above example the "fix" had been LEFT of intended track then it would have been necessary to reverse the RULE and have the base-line to the LEFT.

TO DETERMINE TRACK ERROR: The track error is determined by placing the RULE with the centre of the base-line OVER THE Position oF SETTING HEADING and the base-line along intended track. The RADIAL which intercepts the "fix", interpolating if necessary, is the track error. In the above example the track error is 4'.

GROUND SPEED, TIME, DISTANCE COMPUTER :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 rotatino scale the TIME SCALE.

On all ground speed, time, distance problems the SPEED INDEX is either opposite ground speed or will position itself opposite ground speed. Distance and time are always opposite each other.