Myself and a friend have been looking for some time for a simple to use camera to aid launching a rib on a slip. I think I have found the perfect one.
It is :
Direct WiFi connection to phone or tablet Android or IOS
No internet connection needed.
Simple on off switch
Has incredible range. I tested to 50m and ran out of garden it claims 100m
Very easy to set up and use
Inbuilt rechargeable battery
Waterproof
Magnetic with very strong magnets
Can flip image both vertical and horizontal
Reversing lines can switch on and off
Very low latency
Cost £40 on eBay
It is the MHCABSR Canera.
Video below