Surface
Launch and dive
The hull leaves the deck with a recovery plan already signed. Nothing enters the water on the assumption that it will be fine.
0 M
Subsea Autonomous Survey
We operate autonomous survey vessels below four thousand metres. What comes back is measurement, with the raw returns attached, so a decision can rest on evidence instead of a summary.
Station survey400 KHZ
STATION 61.4272 N / 2.1085 E
SEA STATE 4
HULLS DEPLOYED 02
DEEPEST RETURN 4,318 M
UPLINK NOMINAL
Why the fleet exists
Most of the ocean floor has never been measured. What passes for a map is an interpolation between two distant soundings, drawn with confidence it has not earned. We go and look, and we bring back what was actually there.
What the fleet is for
Five things we do, and nothing else
A survey company that claims to do everything is telling you it has never been told no by the ocean.
Seafloor mapping
± 9 cmMultibeam and synthetic aperture survey to full ocean depth, delivered as gridded bathymetry with the raw returns attached. If the grid is wrong you can go back and see why.
Line accuracy
Structure inspection
± 4 cmClose approach on pipeline, riser and manifold. Wall thickness, cathodic protection, free span geometry, measured against the as-laid record rather than the design drawing.
Standoff hold
Persistent watch
90 dSeason length deployment for questions that only exist as a trend. Thermal structure, current shear, plume arrival. Ninety days on buoyancy alone.
On station
Repeat differencing
Full resThe same hull flying the same line months apart, differenced at full resolution. The only honest way to say whether a seabed is moving.
No resampling
Under ice
61 dDeployment with no surface to return to. Sparse acoustic beacon navigation, hard energy reserves, and a recovery plan argued over before anything enters the water.
Longest under ice
Single ping, raw amplitudeGAIN 0 DB
Delivered unprocessed alongside every gridded product. If a feature is in our map, it is in this trace too.
Line plan, campaign 2412 KM
The same lines, flown again nine months later.
Trench Line 4One dive, start to bed
0m
Depth below surface
Sunlight ends
Last light
Below two hundred metres there is nothing to see by. Every observation from here down is acoustic, and the vehicle is navigating on memory.
200 M
Midwater
Dead reckoning
No satellite, no landmark. Position is inertial, corrected by the Doppler log once the bed is close enough to lock onto.
1,200 M
Abyssal
Bed acquired
The survey altitude is held at forty-five metres. The line plan starts and does not deviate, whatever the returns start showing.
3,000 M
Deepest return
On the line
Forty hours of it. Multibeam, sub-bottom, stills at every waypoint. The vehicle records; it does not interpret.
4,318 M
Fleet 03
Three hulls, one control stack
Deep survey
HALVARD-9
Six kilometres down, running a survey line for forty hours without asking anything of the surface.
40 h submerged
Long endurance
DRIFTER
Ninety days on station, moving on buoyancy alone, reporting only when it has something worth saying.
90 d on station
Inspection
SOUNDER
Built to work within a metre of something expensive without touching it.
12 h untethered
What the returns showed
Three campaigns, written up honestly
Ten years, measured
0
Hulls in service
0
Metre depth rating
0
Campaigns completed
0
Hulls lost
The instrument does not have an opinionA seam is where the ocean gets inDeliver the raw returnsRecovery is the missionThe instrument does not have an opinionA seam is where the ocean gets inDeliver the raw returnsRecovery is the mission
Deployment windows
Windows are allocated eight to fourteen weeks out. Under-ice work is planned a season ahead, because the recovery hole has to be cut before anything else is decided.