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If lost at sea, use natural indicators such as the sun's position, stars, or prevailing currents/winds to guide your navigation.

Avoid direct sunlight exposure by using any available materials for shelter to prevent sunburn and hyperthermia.

Ration your fresh water supply, avoid sweating and drink sparingly, but sufficiently, to maintain necessary hydration levels.

Use flares, brightly colored fabric, or improvised flags to create highly visible signals by day, making it easier for rescuers to spot you.

Familiarize yourself with a marine radio's operation to call for help; use channel 16 (156.8 MHz) for distress and safety calls.

If stranded with a group, stay close together in a huddle to share and preserve body heat, especially in colder water temperatures.

Whenever you find yourself in the water, try to stay afloat with minimal energy; use the 'dead man's float' or back float to conserve energy and maintain buoyancy.

Mastering the skill of starting a fire, using waterproof matches or a flint striker, is essential for warmth and cooking.

Maintain mental strength through positive thinking, setting small goals, and staying active to prevent panic and despair.

In the absence of fresh water, use a makeshift solar still or desalination kit to evaporate and condense seawater into drinkable water.

To deter curious or aggressive sharks, maintain eye contact, stay calm, and if necessary, firmly push them away by the nose or gills.

Use a flashlight, whistle, or reflective mirror to create the universal distress signal, SOS (· · · — — — · · · in Morse code). It is crucial in attracting rescuers' attention.

Learn basic fish trapping techniques, such as making nets or improvised fish traps from debris, for securing a food source.

Use a signaling mirror to reflect sunlight and create a flash visible to ships and aircraft; it can be seen for many miles.