Seatrekking
Seatrekking is a sport that consists in exploring the shorelines of oceans, seas, bays, lakes or rivers both above and below the water over the course of several days, without the aid of a boat or a watercraft. Seatrekking involves swimming, snorkeling, freediving and hiking, and combines all these disciplines into a distinctive form of sport and outdoor experience. Unlike coasteering, seatrekking includes overnight camping and involves trips of longer distances. Ethics. Seatrekking adheres to the Leave No Trace principles. Additionally the sport is specifically committed to the conservation of natural environments along the coastline by travelling in small  groups to minimize the impact on the environment and the disturbance on wildlife, and by complying with any local regulations and obtaining any necessary authorizations. Safety. Seatrekking can be dangerous, and is a physically demanding activity due to its engagement with open water. A good physical condition, swimming proficiency, knowledge of outdoor safety, self-rescue and usage of adequate equipment are important to practicing seatrekking safely. Open water swimming and snorkeling hazards include drowning and hypothermia due to prolonged time in the water. Recommended safety equipment may include a wetsuit, personal locator beacon, dive flag and a whistle. Weather and  ocean patterns and forecast require particular attention. It is crucial for personal safety to keep up-to-date with local conditions regarding tide, swell, wind, ocean currents, rip currents as well as the weather. Equipment. Seatrekking requires the use of a waterproof bag; this contains all equipment and food, and is dragged in the water using a rope or leash. Hydrodynamic properties of the bag are essential to reduce drag. It also acts as a supplementary safety flotation device in the water, especially when the bag can be inflated and maintain internal pressure. On land, the bag is carried as  a normal backpack along hiking sections. At sea, other equipment consists of common items used for swimming, snorkeling or freediving, such as mask and snorkel, fins, and optionally a wetsuit depending on water temperature. On land, essentials are hiking clothes and shoes, as well as bivouacking equipment. Additional equipment is selected for its lightness, fast drying time and suitability for prolonged use in a marine environment.