Delta Marine and Bannenberg & Rowell open a 50-75m line

A range, not a one-off

Seattle yard Delta Marine has unveiled a new family of yachts with London design house Bannenberg and Rowell, spanning 50 to 75 metres and sharing a common design language across the range. The first model shown is the 50-metre Delta plus B and R 500.

That first hull is drawn as a sub-500 GT platform, which caps interior volume in exchange for expanded exterior decks. A 65-metre version is already under development, with the intent that the line scales cleanly from the smallest hull to the largest without a redesign at each step.

The design and the drive

Bannenberg and Rowell give the range horizontal lines, sculpted aft bulwarks and angled canopies, with the exterior decks treated as extensions of the interior rather than separate spaces. The look is meant to hold together whether a buyer orders the 50 or steps up toward the 75.

Every yacht in the line runs a diesel-electric hybrid drive with podded units and an integrated battery bank. The yard frames it as fuel and emissions savings across a range of operating profiles, from slow cruising to a quiet night at anchor on batteries alone.

Why an American range matters here

Delta is one of the few US yards building at this size, and a defined 50-to-75m line is its bid to keep American owners from defaulting to northern European builders. A common platform lets a buyer negotiate a known product rather than commission a blank-sheet custom each time.

For the owner, a range with a sub-500 GT entry point and a hybrid drive as standard is a hedge on both crew cost and future emissions rules. The sub-500 GT tier keeps manning and survey requirements lighter, while the hybrid spec protects resale as harbour rules tighten.