The lightest underwater robot with a listed weight in our catalog is the Blueye X3 Ultra, at 8.6 kg (8600 g) — a portable four-thruster mini-ROV with a 305 m depth rating, an NVIDIA Jetson Orin NX for onboard AI, and 5 h of battery runtime, which makes it well suited to hand-carrying onto small boats. blueyerobo...blueyerobotics.com ↗“mechanical.weight_g=8600 g”
For comparison, here is the full weight ranking of the ROVs that list a weight in the catalog: blueyerobo... +4blueyerobotics.com ↗“8600 g”avinc.com ↗“11800 g”avinc.com ↗“13600 g”avinc.com ↗“17200 g”blueyerobotics.com ↗“20000 g”
| Rank | ROV | Weight | Thrusters | Depth rating | Manufacturer |
|---|---|---|---|---|---|
| 1 | Blueye X3 Ultra | 8.6 kg | 4 | 305 m | Blueye Robotics |
| 2 | Mission Specialist Pro 5 | 11.8 kg | 3 | 300 m | AeroVironment |
| 3 | Mission Specialist Ally | 13.6 kg | 4 | 300 m | AeroVironment |
| 4 | Mission Specialist Defender | 17.2 kg | 7 | 300 m (standard) | AeroVironment |
| 5 | Blueye X7 | 20.0 kg | 7 | 500 m | Blueye Robotics |
The X3 Ultra's compact dimensions (257 × 354 × 485 mm) also make it the smallest of the five, which helps when deck or stowage space is tight. blueyerobo...blueyerobotics.com ↗“485}”
One caveat: of the six underwater robots in the catalog, one has no weight value listed, so I can't rank it — the X3 Ultra is the lightest among the five with a stated weight.