I've started getting interference on FM radio. Not sure exactly when it started as I've been overseas for the last few weeks.
It happens every half hour or so (but not exactly).
It's some rhythmic buzzing, followed by a series of clicks. Always exactly the same. It lasts about 5-7 secs.
The only time I've heard anything like it came through the car radio when driving near the main Heathrow Airport radar years ago.

There's no big radars near me apart from Devonport navy base a couple of streets away, but would the ships be using high powered stuff when they are tied up alongside?

Is anyone else in Auckland experiencing the same thing?

Has anyone got any thoughts on what it could be?