bought one of these on a whim out of belfast angling centre.
tried it out the last time i was out and it does work. simple quick an easy. nothing something i would use all the time on marks i already fish and already know the water depth but it can do no harm to double check. i think ill find it most useful on rock marks ive never fished before so i know what depth to set my float but as it cost £15 i hate the idea of it getting snagged on the bottom. still, it does save me about 2 minutes of time plumbing the depth at the edge but it does make it easier to find water depth further out which i find harder to do with a float.
all in all i would say it will be handy to have but far from essential
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