Marine Technology

What is a marinized engine?

In a recent issue that included a story on repowering, we wrote that Volvo marine marinizes Kubota engines for some of its engine offerings. This point brought a response from Stanley Feigenbaum, one of the founders and former owners of…

Battery changes?

Twenty years ago my husband and I were inside a Florida Sam’s Club buying deep-cycle lead acid batteries for our Peterson 44. That same year the Maxi-cat Playstation set a transatlantic speed record with a lithium battery on board.…

DYI electronic navigation

Navigation software for viewing electronic charts, voyage planning and in-voyage navigation has come a long way from the early days of raster images on a computer monitor. Navigation software packages are offered by an assortment of companies as either…

A digital sextant

Sextants are wonderfully analog optical devices. A sextant user from the 1850s would have little problem using a modern sextant. Now a company in South Korea has begun offering something it calls the Korea Digital Sextant (KDS) that digitalizes…

Battery types

Wet cells: The de facto standard for high capacity batteries in boats for many years has been the basic wet cell lead-acid battery. These are somewhat simple in design. Plates are submerged in a liquid acid electrolyte contained in a…