R-400 — Starting selection brief
Manufacturer: Boya Gongdao

A 520 kg work-class ROV rated to 800 m, with a 50 kg payload and 12 thrusters for offshore wind foundations, subsea cables and hydropower tasks.

Vehicle weight: 520 ± 10 kg
Depth rating: 800 m
Payload: 50 kg
Dimensions: 2,080 × 1,020 × 1,150 mm
Thrusters: 12 (8 horizontal vector + 4 vertical)
Cruise speed: 1.65 m/s
Cameras: Four 1080p: front, rear, left, right
Power: External tethered supply, shore power unit

Configuration note: Sonar and five- or seven-function manipulators are optional items purchased separately. The manufacturer describes modest support-vessel requirements; confirm the vessel, launch system and complete-system footprint for each project.

Confirm current specifications and delivered scope with the manufacturer before purchase.