Best strategies to prevent sunburn while stranded at sea?

Staying Protected from the Sun

When stranded in a life raft at sea, finding shade is crucial to prevent sunburn. If possible, position the raft with the sun at your back, allowing you to maintain a shaded area. Alternatively, use a waterproof umbrella or makeshift canopy to create your own shade. Apply a broad-spectrum sunscreen with a Sun Protection Factor (SPF) of at least 30, and reapply every two hours or immediately after swimming or sweating. Wear lightweight, loose-fitting clothing that covers your skin, such as a long-sleeved shirt and pants. A wide-brimmed hat can also provide additional protection for your face, neck, and ears.

Desalination and Hydration

While preventing sunburn is essential, staying hydrated is equally critical. Use a solar still or transpiration bag to collect and purify seawater for drinking. Aim to consume at least 1 liter of water per person per day, and consider rationing your supplies if you’re unable to collect more. Make sure to drink water regularly throughout the day, rather than consuming it all at once, to maintain proper hydration levels.

Signaling for Rescue

Once you’ve secured a shaded area and ensured access to clean drinking water, focus on signaling for rescue. Use a mirror or shiny object to reflect sunlight towards any passing aircraft or ships during the day. At night, create a fire using dry wood and other flammable materials to produce smoke, which can be seen from a distance. Use a whistle to signal for help, and consider creating a large “HELP” or “SOS” sign using your life raft’s materials to make it visible to potential rescuers.