Oi Legs - are we using the same kit?
Squawk standby: Depending on the radar display, some sort of SSR label will be visible, be it a 'z' or whatever
Whenever I tell people to squawk standby they put the transponder onto standby mode (normally the switch position before 'off' - keeping it warm and ready to go) and nothing gets displayed on the screen at all.
Hope all is well at the funny farm
