Hi all. I just purchased a 2019 Tandem Island. I was going over the differences between it and my previous 2010 Adventure Island. I came across a hole/port in the kayak that wasn't on my previous one. It is behind the rear seat and goes down, with sides similar to a rod holder tube, but not thru the hull. It looks to be an excellent place for water to enter into the hull. Is there an accessory or cover that I should have gotten when I bought the TI. I discovered this after the boat was delivered. Here are two pics of what I'm talking about. My apologies if this is a dumb question but my other kayak didn't have it.


That's the access hole for the depth sounder transducer. There is a cover plate on the bottom of the kayak where the transducer can be installed. The black thing next to the hole is for extending the cable in a watertight manor from inside the hull. The hole does go all the way through but turns a corner so you can't see straight through.
Only problem it causes is that sand goes into the transducer cavity when slid on the beach and is hard to flush out completely so that the boat drops sand for ages after.

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