The mizzen mast on a ketch is often the place to hang ‘stuff’. On my ketch I had the wind generator, radar and a back-up vhf antenna on the mizzen.
But I think this one I snapped recently takes the prize for busiest mizzen.
It’s carrying a lightning dissipater, vhf antenna, wind generator, tv antenna, loud hailer and radar antenna. Presumably there’s a sail up there once in a while, too.
I see a triatic stay, as well, which means that if the main mast is lost the mizzen is likely to be lost too, along with all that stuff.
A mizzen to hang things off is the only real advantage I’ve ever found for a ketch versus a sloop – but that’s an argument for another day.