The main sign of a leak in a tandem inflatable kayak is deflation. Once you notice that your kayak is leaky, you may proceed to locate the leak by searching for the punctured area. To avoid an accident, you should stay as close to the shore as possible. However, deflation doesn't automatically mean that there is a leak. If you are unable to locate a puncture, then your kayak may have been deflating for some time. You should be able to keep it afloat by inflating it with a little more air. Check out the 5 best pumps for an inflatable kayak.