Let Someone Know. Simple. Do a float plan. Or send an email to a friend. Or a text. In todays hyper connected world there is no reason not to do this. In it's simplest form it can be telling them where you are going and when you will be back, and what to do if you don't check back at the appropriate time. Here is a free download of a more extensive float plan I use on big trips. Choose your contact person wisely. You don't want someone who will forget you are out there!