Military Flow Arrows
What you need to know
Military low flying takes place across most of the UK, often as low as 100ft Above Ground Level (AGL) for helicopters, and 250ft AGL for fixed-wing traffic.
The highest concentrations tend to be below 1000ft AGL, so General Aviation pilots are strongly recommended to remain above this height during enroute flight.
The flow arrows depicted on military low-flying charts are not depicted on CAA VFR charts, and there is no requirement for civilian pilots to observe the associated military regulations. However, it is good practice to know where these are in order to avoid any unnecessary or avoidable incidents.
Find out now if there are Military Flow Arrows in your area, they are identified as dark blue arrows in the link below:
Below is a report from the Airprox Board of an incident between GA and low-flying military traffic:
In summary, make sure to:
Check flying charts
Check eAIP 6-76 for dark blue arrows
Stay above 1000ft AGL during enroute flight
Civil 1:500,000 VFR Chart
Military 1:500,000 VFR Chart
eAIP 6-76