Yellowfin
Compact, Self-Righting, Efficient
A truly enabling ASV platform, allowing researchers quick deployment with as little as a single-person field crew - readily launched through consistently plunging breakers and able to collect high resolution sounding data within minutes of arriving on site. Recovery through the same swash conditions is as easy as switching into manual mode, timing a wave and riding it ashore to a controlled grounding.
Scaled-down and refined for robust surf-zone survey - designed specifically for operations in shallow water and turbulent waves & currents - where spilling breakers are typically encountered
Compact and lightweight - supports rapid single-person launch & recovery through consistently plunging breakers and easily portable to remote launches
Efficient self-righting hull design & integrated sensor payloads result in field productivity
High agility and plenty of reserve power support beach launch and recovery in aggressive wave conditions
Completely sealed
Hull Type
Compact, narrow-beam, semi displacement, low drag, passive self-righting hull constructed from advanced composites for maximum durability, impact resistance and field serviceability.
Designed specifically for efficient operation at survey speeds (~2m/s)
Sensor Payload
Payload elements are highly integrated into the hull and need to be specified at the time of ordering,
Single Beam Echosounder
Cerulean S500 or Echologger ECS (200/450 kHz)
Integrated to onboard data acquisition with future upgrades allowing real-time depth telemetry to Operator Basestation
GNSS
Emlid Reach M2
cm-level GNSS with dual-band support (L1/L2) PPK
RTK support integrated to Cerulean S500 when equipped
Integrated IMU
Attitude (roll, pitch) measured by Ardupilot
The Z location used for heave compensation / water level measurement used to calculate wave heights, tidal water levels or surge.
Specifications
Physical
Motor: 5.8 kW (Max) DC Drive
Propulsion: Jet Drive
Hull Construction: Innegra / Basalt
Overall Dimensions LxWxH: 67" x 10" x 9" / 1700 x 250 x 230mm
Draft (without sensors): 3" / 75 mm
Mass (approx): 25 lbs / 11.5 kg
Capability
Mission Payload Capacity: 7 lbs / 13.5 kg
Shallowest Launch Depth: 4" / 100 mm
Typical Endurance1: 7+ Hrs
Max Survey Speed: 6 kt / 3 m/s
Max Cruise Speed: 20+ kt / 10+ m/s
Max Wind: 20 kt / 10 m/s
Max Wave2:: 5-6 ft / 1.5-1.8m
1Endurance taken at @ 2m/s survey speed, 1.2 kWh battery capacity under actual field operating conditions off eastern-facing North Atlantic beaches.
2Max Wave Height depends on wave period and amount of breaking
Measured Accuracy
3-5 cm (PPK GPS) vessel XYZ position relative to NAD83/NAVD88 or user-selected datum
Approx. 5 cm RMSEz compared to GPS pole mount measurements
2 cm RMSE3 or ± 10 cm maximum error when track lines are sampled similarly with equipment and methods established by U.S. Government Agencies (USACE)
3Interpolation between track lines introduces a substantial error component in reconstructing bathymetric surfaces from SBES data and is therefore dependent on track spacing.