The Mk-1
This is the only quarter mil rule. The 1:250,000 maps are used by general aviation and helicopter operators who wrote and asked for a rule that suited their navigation. UAS squadrons were using Bulldogs back then but the Mk-1 has the outline of a Grob Tutor in the compass rose.
This is the only quarter mil rule. The 1:250,000 maps are used by general aviation and helicopter operators who wrote and asked for a rule that suited their navigation. UAS squadrons were using Bulldogs back then but the Mk-1 has the outline of a Grob Tutor in the compass rose.
The Mk-2
Over the years, there have been several requests for a half-mil version of the Mk-1 for use on low level charts. The speed scales span 90 to 150 knots and the faster speeds also have 10" marks for use on OS 1:50,000 charts.
Over the years, there have been several requests for a half-mil version of the Mk-1 for use on low level charts. The speed scales span 90 to 150 knots and the faster speeds also have 10" marks for use on OS 1:50,000 charts.
The Mk-3
This was the mainstay of the fast jet world for 15 years, developed from the initial design back in 1987. All turning circles were at 2g.
Later, I was asked to include 3g and 4g turns at common low level speeds of 420 and 450 knots by Harrier and Jaguar pilots.
This was the mainstay of the fast jet world for 15 years, developed from the initial design back in 1987. All turning circles were at 2g.
Later, I was asked to include 3g and 4g turns at common low level speeds of 420 and 450 knots by Harrier and Jaguar pilots.
The Mk-4
This was made for Tornado crews who specifically asked for certain features to be added to the Mk-3; specifically, the auto TFR turning circles and the 500/520 speed scales.
Now, both Mk-3 and Mk-4 share many common features and a Hawk in the compass rose. Interestingly, some pilots asked for right turns and some for left turns! There is no pleasing some people, so now the Mk-4 turns are to the right. The Mk-3 remains a left-turn rule!
This was made for Tornado crews who specifically asked for certain features to be added to the Mk-3; specifically, the auto TFR turning circles and the 500/520 speed scales.
Now, both Mk-3 and Mk-4 share many common features and a Hawk in the compass rose. Interestingly, some pilots asked for right turns and some for left turns! There is no pleasing some people, so now the Mk-4 turns are to the right. The Mk-3 remains a left-turn rule!
Mk 5
Currently in Development
Standby...
Currently in Development
Standby...