Re: WristWatch Selection
[quote=MyData]Breitling Navitimer.
MyData wrote:
"For those who have one (or similar) there is a marker on the inner and outer dial at 36. This isn't explained in the instructions, nor could anyone help in the shop where it was bought. Does anyone know what this is for? I would guess that 36 maps to 3600 seconds in an hour so might have something to do with converting rates between per second and per hour or minute?"
I bought my Navitimer in HKG in '71 and have used it ever since. Still got the original handbook. You're right, the '36' is the second index and is used for calculating seconds to cover a given distance.
Quote from the handbook:
Known: Miles per hour and distance.
Required: The number of seconds to cover the distance.
A pilot is approaching the airport at a ground speed of 120 mph. The fan marker is 1 1/2 miles from the runway. How many secs from the marker to the runway?
Solution: Set 120 on the white dial opposite 36 on the outer black dial. Opposite 1.5 on the white dial read 45 secs on the outer black dial.
Where the white dial is the one that rotates, the outer black dial is its fixed circular slide rule partner.