The Garmin Three Plus hand-held GPS is top of my list, replacing a Garmin III as our GPS back-up. Last summer, a fellow radio ham got us lost in some French mountains, but the Garmin III helped us work out where we were.

Any boat when it's moving produces several clifferent wave patterns. But, producing waves involves expending energy, so the smaller the waves you can make, the better. At low speeds, the drag is almost all friction. At 'hull speed' and beyond, it's wave-making drag that dominates.
As a boat starts moving forward, a bow wave appears with a shallow trough and a secondary wave forming behind it. There's also a stem wave, but we can ignore this for the moment. As boat speed increases, so does the wavelength between bow wave and secondary. When the speed (in knots) is equal to about 1.34 times the square root of the waterline length (in feet), the wavelength and the boat's waterline length will be equal, and the secondary wave will be at the stem. The boat is now at its 'hull speed'.

To prevent headsails, young children or even pets going overboard, it's common to see netting laced between the upper wire and the deck, particularly forward: and remember, bowsprits also need safety netting.
A frrm hand-hold on top of a well braced steering pedestal is useful but the crucial moment arises when you want to step out of the cockpit and go forward. Many boats have strategically placed grab rails to cling on to - sometimes incorporated into the spray hood.

BoatsExplained.com tells us how to avoid it

AtheY set off on a round the world race, a well known skipper told his crew "if
you fall overboard, I'm not coming back." It caused quite a stir at the time, but serves to highlight two important points. The fIrst is to impress on any crew that they have a responsibility to stay aboard. Secondly, it recognises that our attention is best directed to prevention rather than cure.