Interval Lat or Long
 

For Honeywell FMC. Not sure where this can be useful or how it is entered.

Anybody?

Not sure if this is what you mean..........

Entered as an alongtrack waypoint at L1, for example, W010-5, which should give the W010 point on you flight plan track (assuming there is one, like from the US to Europe) and then also a point every 5 degrees (W015, 020, 025, etc) until the end of the route.

So the number after the dash/minus is the interval.

Thanks, now I understand it better. Have you ever found it useful in line operations?

I have not found it useful during line op's.

More for playing around and seeing if you went direct where your great circle route would really be verses a your flight plan. For example, VHHH direct KJFK in the FMC will give you distance and initial bearing, but not much other info. Doing along track points at an interval will let you see where the great circle route really fall, how far north you really would go, bearings on each segment,etc.