Even on a short, sunny day sail, why might sun protection and staying hydrated be more important on a boat than the conditions might suggest?

A. Sun and hydration are not meaningfully different on the water compared with on land

B. Reflection off the water significantly increases UV exposure compared with an equivalent day ashore, and wind can mask both heat and the feeling of thirst, meaning people often become sunburnt or mildly dehydrated on the water without initially realising it — both reduce alertness and general wellbeing over the course of a day

C. Sunburn risk is only relevant in tropical climates, never in UK waters

D. Dehydration cannot meaningfully occur on a day sail lasting only a few hours

A. Port and starboard change depending on which way the boat is facing

B. Port is the left-hand side and starboard is the right-hand side of the boat, when facing forward (toward the bow) — these terms are fixed to the boat itself, not to the direction you happen to be looking

C. Port refers to the front of the boat and starboard refers to the back

D. These terms are only used on larger commercial vessels, never on small craft

A. Always move as quickly as possible regardless of conditions

B. Keep one hand for yourself and one for the boat — maintain a secure handhold wherever practical, and move deliberately rather than rushing, especially in any kind of sea state

C. It doesn't matter how you move around, as long as you get where you need to be

D. Only the skipper needs to think about safe movement around the boat