The complete guide
Why a buoyancy aid is not optional, whatever boat you're fishing from
Of everything on this accessories list, this is the one item we would call genuinely essential rather than a nice-to-have upgrade.
Why a belly boat's own buoyancy isn't enough
A belly boat keeps the boat itself afloat, but if you end up separated from it — capsizing, a puncture, or simply falling out while landing a fish — the boat's buoyancy doesn't help you. Personal flotation has to be worn on your body, which is exactly what a buoyancy aid does.
What "ISO 12402, 50N" actually means
This is a real, checkable certification standard, not marketing copy. It specifies a minimum buoyancy rating a garment has to meet to be sold as a genuine PFD (personal flotation device) rather than a swim vest with flotation-adjacent branding.
Fit matters as much as certification
A buoyancy aid only performs as rated if it fits snugly — too loose and it can ride up in the water, reducing how effectively it supports you. Try the size that matches your chest measurement, not just your usual clothing size, and adjust the straps fully before you launch.
Wearing it every time, not just sometimes
The sessions where a buoyancy aid matters most are rarely the ones you'd predict in advance. Make wearing it a fixed part of launching your belly boat, every time, rather than a judgement call based on how calm the water looks that day.