Project Petra Motor Yacht

Nine crew members looking after twelve guests gives Project Petra room to run at a measured pace, a ratio built for weeks at sea rather than a short weekend aboard. RMK Marine is building this fifty-metre explorer in steel and aluminium, due for delivery in 2028.

Build and provenance

RMK Marine builds Project Petra with a steel hull and an aluminium superstructure. Hot Lab designed her exterior and interior styling, and Van Oossanen handled her naval architecture, pairing a contemporary design language with engineering built for distance. At 499 gross tonnes she sits in a size band that keeps her efficient to operate for her length.

Layout and accommodation

Project Petra sleeps twelve guests across six cabins, with a crew of nine looking after them in their own quarters, quarters enough for real duty rotations, not a skeleton crew. Full-height windows run through the interior, keeping the cabins and saloons filled with light.

Performance and engineering

She is built for a 12-knot cruising speed and a 16-knot top speed, numbers that describe a displacement explorer covering distance steadily rather than one built to plane. A 3,500 nautical mile range extends that reach further, putting a long passage within a single tank rather than a string of short hops.

On deck and at anchor

A sky lounge and a master cabin with its own balcony are part of the layout, and dedicated toy and dive storage keeps expedition gear out of the guest areas. The gym, the cinema, the helipad and ice-class capability are all listed as options rather than standard fit, so a buyer configures the boat around how they actually plan to use her.

Where she lies and how to see her

Project Petra is based in Monaco. Boatcrowd sets up viewings there and is present for them, and once an offer is accepted, survey and sea trial are scheduled to follow, the standard steps before handover on a yacht still in build.