The area you guys are talking about is on outboard powered boats. The I/O's and SEA-DRIVES had the fuel tank there, and the in deck fishbox was where your gas tank is on these models. It is just simply the bilge of the boat. Any water that gets in through the anchor area or through the cabin runs through there. Or any water in your bilge can slosh up there while running.
Here's the deck of my SEA-DRIVE. You can see the tank hatch is furthur forward, and there is a big fish box/livewell behind it.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD
AND THE PINK JEEP!!!! R.I.P.
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