Do not tow non-swimmers or weak swimmers unless they wear an approved and appropriate flotation device. Toss a life-saving device even if the person can swim. A life ring is the preferred device. It can be thrown farther and is easier to hang on to. However, use whatever device is nearest.
Time is essential.
Slow the boat, keeping the person in view. Other persons onboard should act as look outs. At night, direct the best possible lights on the victim. Try to approach the person from downwind or into the waves. Always use common sense and good judgment.