10 mile markers - Why teach them ?
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I must agree with swamp on this one.
When I was learning to navigate and was having difficulties in accuratley fixing my position, my instructor at the time told me to use "halfway markers".
We would go on a nav....get to a turning point and mark the time. Within 10 minutes, I was to get another pinpoint and again mark the time.He would then take my map off me(or put me under the hood) and get me to maintain a constant hdg and constant alt...and not touch the throttle.
when we would get to the planned half-time on the leg, I would then be reunited with my wac chart and told:
1/ draw a line from the turning point thru the pinpoint and keep going.
2/ work out my groundspeed from the turning point to the pinpoint.
3/look at my watch and work out exactly how many miles we were from the turning point and then follow along the line I had drawn until I reached that distance
4/look at the map and find a feature that should be there and then look at the ground for it
This method I find works exceptionally well in any speed aircraft.(provided you maintain a constant hdg and alt!)It is also handy in teaching "lost" procedures.It also stops the student from constantly looking for features on the ground/map and gets him/her to just fly the plane!
With a halfway point...you already know how long the other half will take.Your closing angle will just be double your track error, and the workload is significantly reduced!
AVIATE , NAVIGATE , COMMUNICATE
When I was learning to navigate and was having difficulties in accuratley fixing my position, my instructor at the time told me to use "halfway markers".
We would go on a nav....get to a turning point and mark the time. Within 10 minutes, I was to get another pinpoint and again mark the time.He would then take my map off me(or put me under the hood) and get me to maintain a constant hdg and constant alt...and not touch the throttle.
when we would get to the planned half-time on the leg, I would then be reunited with my wac chart and told:
1/ draw a line from the turning point thru the pinpoint and keep going.
2/ work out my groundspeed from the turning point to the pinpoint.
3/look at my watch and work out exactly how many miles we were from the turning point and then follow along the line I had drawn until I reached that distance
4/look at the map and find a feature that should be there and then look at the ground for it
This method I find works exceptionally well in any speed aircraft.(provided you maintain a constant hdg and alt!)It is also handy in teaching "lost" procedures.It also stops the student from constantly looking for features on the ground/map and gets him/her to just fly the plane!
With a halfway point...you already know how long the other half will take.Your closing angle will just be double your track error, and the workload is significantly reduced!
AVIATE , NAVIGATE , COMMUNICATE
