CHCNAV Apache 4 Pro USV Bathymetric System
The Apache 4 Pro is a versatile unmanned survey boat for hydrology and bathymetry. It works with mainstream ADCPs and integrates the CHCNAV HQ-400 multibeam for detailed underwater mapping.
A 50 kg payload, anti-entanglement motors and an optional automatic sound-velocity-profiler kit make it the all-round platform of the Apache family.
Key features
- Rugged hull – Carbon fibre, 10 MPa, mesh-covered motors.
- Anti-entanglement – 70% lower entanglement with tangle alarm.
- Versatile payloads – RiverStar, M9, RiverPro, RioGrande, HQ-400, side-scan, water quality.
- Advanced echosounder – Anti-interference transducer, 10 cm blind zone.
- Smart controller – 4G + 2.4 GHz Android remote with EasySail.
- Automated SVP – Optional sound-velocity profiler kit for multibeam.
At a glance
- 50 kg payload
- 240 mm ADCP shaft
- 10 h @ 1.5 m/s
- 8.6 cm draft
- 3 mm sounding resolution
- <1 min SVP kit install
Supplied, installed and supported by LATNET in Calgary. Contact us for pricing.
See it in action – videos
- Authorized CHCNAV dealer in Canada
- Setup, training & local support from our Calgary geomatics team
- Shipped across Canada from Calgary
- See it before you buy – live demo or rental available
CHCNAV Apache 4 Pro – one survey boat for depth, flow and water quality
The Apache 4 Pro is a versatile unmanned survey boat for hydrology and bathymetry. It works with mainstream ADCPs and integrates the CHCNAV HQ-400 multibeam for detailed underwater mapping.
A 50 kg payload, anti-entanglement motors and an optional automatic sound-velocity-profiler kit make it the all-round platform of the Apache family.
Depth and flow in one platform
Adaptive straight-line navigation suits ADCP cross-sections, while EasySail overlays multibeam coverage and flow-velocity vectors on satellite imagery, adjusts parameters automatically and syncs data in one click. In Alberta, RTK corrections can come from the LATNET RTK network over 4G. See how single-beam, multibeam and ADCP surveys work in our 3D animations.
Why choose the Apache 4 Pro
Rugged hull
Carbon fibre, 10 MPa, mesh-covered motors.
Anti-entanglement
70% lower entanglement with tangle alarm.
Versatile payloads
RiverStar, M9, RiverPro, RioGrande, HQ-400, side-scan, water quality.
Advanced echosounder
Anti-interference transducer, 10 cm blind zone.
Smart controller
4G + 2.4 GHz Android remote with EasySail.
Automated SVP
Optional sound-velocity profiler kit for multibeam.
Collision-resistant carbon fibre
High-modulus carbon fibre and HPT one-piece moulding give up to 10 MPa hull strength; mesh covers protect the motors from impact.
Work through weeds
A titanium-alloy mesh cover with hybrid water-pressure conversion cuts entanglement by 70%. If the motor does become tangled, a software alarm warns the operator.
Reliable depths in complex terrain
High-sensitivity, anti-interference transducers with residual-vibration elimination and adaptive parameters deliver 3 mm resolution and a 10 cm blind zone.
Multibeam-ready from the remote
The Android remote with 4G and 2.4 GHz runs EasySail for route planning, live data and video. The optional automatic SVP kit installs in under a minute and is controlled from the remote – a complete multibeam solution on one USV.
Compare CHCNAV Apache survey boats (USVs)
Five carbon-fibre, triple-hull unmanned survey boats – from a one-person single-beam boat to a multibeam platform for near-shore work.
| Apache 3 | Apache 3 Pro | Apache 4 | Apache 4 Pro | Apache 6 | |
|---|---|---|---|---|---|
| Best for | Low-cost single-beam bathymetry | Single-beam under bridges, weedy water | ADCP discharge + multibeam | All-round: depth, flow, water quality | Multibeam + LiDAR, near-shore |
| Size | 1080 × 555 × 380 mm | 1080 × 555 × 380 mm | 1280 × 720 × 420 mm | 1280 × 720 × 420 mm | 1670 × 1000 × 510 mm |
| Weight / payload | 20 kg / 35 kg | 21 kg / 35 kg | 30 kg / 40 kg | 29.6 kg / 50 kg | 46.5 kg / 60 kg |
| Endurance | 7 h @ 1.5 m/s | 10 h @ 1.5 m/s | 10 h @ 1.5 m/s | 10 h @ 1.5 m/s | 6 h @ 2 m/s |
| Top speed | 6 m/s | 7 m/s | 6.5 m/s | 6.5 m/s | 6 m/s |
| Draft | 10 cm | 10 cm | 8.6 cm | 8.6 cm | 7.5 cm |
| Sensors | D270 single-beam | D270, GNSS RTK + INS | D270 + ADCP / HQ-400 / side-scan | D270 + ADCP / HQ-400 / SVP kit | D270 + Norbit multibeam / iLiDAR / SVP |
| Sea state | Wind 3, wave 2 | Wind 3, wave 2 | Wind 3, wave 2 | Wind 3, wave 2 | Wind 6, wave 4 |
| Apache 3 | Apache 3 Pro | Apache 4 | Apache 4 Pro | Apache 6 |
Where it works
Water resource surveys
Reservoirs and lakes.
Hydrological surveys
ADCP discharge and velocity.
Channel dredging
Single-beam or multibeam.
Emergency response
Rapid surveys after events.
CHCNAV Apache 4 Pro technical specifications
| Hull | 1280 × 720 × 420 mm |
|---|---|
| Material | High-strength, high-modulus carbon fibre, HPT one-piece moulding |
| Weight (no battery) | 29.6 kg |
| Maximum payload | 50 kg |
| Hull design | M-type triple hull |
| Draft | 8.6 cm (unladen) |
| Waterproof | IP67 |
| Camera | 360° omnidirectional video |
| Obstacle avoidance | 0.2–40 m, 112° H × 14° V |
| ADCP mounting hole | 240 mm |
| ADCP compatibility | RiverStar, M9, RiverPro, RiverRay, RioGrande and others |
| Other instruments | Compact multibeam, side-scan sonar, water-quality monitor, sampling bucket, automatic SVP kit |
| Motor | Brushless DC, 1000 W, 7200 RPM, pluggable; steering by differential thrust |
|---|---|
| Battery | 32.4 V, 23.1 Ah Li-ion, hot-swap, single or dual |
| Endurance | 10 h @ 1.5 m/s (1 battery set, expandable) |
| Charging time | 3 h |
| Maximum speed | 6.5 m/s |
| GNSS | BDS B1I/B2I/B3I · GPS L1C/A/L2C/L5 · Galileo E1/E5a/E5b · GLONASS L1/L2 · QZSS L1/L2/L5 (internal dual antenna) |
|---|---|
| RTK accuracy | H ±(8 mm + 1 ppm) · V ±(15 mm + 1 ppm) |
| DGNSS / single point | H ±(0.4 m + 1 ppm) / 1.5 m · V ±(0.8 m + 1 ppm) / 2.5 m |
| Heading | 0.1° @ 1 m baseline |
| Inertial navigation | 6°/h; 200 Hz IMU (≈1 m drift after 20 s outage) |
| Radio protocols | Satel 3AS, CHC, TT450, Transparent |
| Echosounder | Integrated CHCNAV D270 single-beam, 200 kHz, 5° beam |
|---|---|
| Sounding range | 0.1–200 m |
| Accuracy | ±0.01 m + 0.1% × depth |
| Resolution | 3 mm |
| Sampling rate | 30 Hz |
| Sound velocity | 1400–1700 m/s, water temperature sensor –55 to +100 °C |
| Remote controller | 10″ 1920 × 1200 Android, 4 GB RAM / 64 GB, 5 h battery, 2.4 GHz |
|---|---|
| Communication | Standard 4G and remote control; 1.5 km radio, unlimited over 4G |
| Interfaces | 2 × RJ45, 2 × RS232, Nano SIM |
| Navigation | Manual or autopilot; local and remote data storage |
| Software | EasySail: route planning, autonomous navigation, 360° video, waveform overlay, attitude correction, export over USB/Type-C |
| Modes | Single-beam, hydrology (flow results), multibeam (real-time parameters) |
Apache 4 Pro FAQ
What can the Apache 4 Pro carry?
ADCPs, the HQ-400 or HN-400M multibeam, side-scan sonar, water-quality probes, a sampling bucket and an automatic SVP kit – up to 50 kg.
Why is anti-entanglement important?
Weeds stop survey boats. The mesh cover and water-pressure design reduce entanglement by 70%, and an alarm warns if it happens.
Do I need a laptop?
No – EasySail on the Android remote handles planning, acquisition, display and processing.
Get the Apache 4 Pro from LATNET
Configure an Apache 4 Pro for bathymetry, discharge or both with LATNET in Calgary.
Request a quoteAll hydrographic productsBuild your Apache 4 Pro survey solution
We can help configure the Apache 4 Pro for bathymetric, hydrological and environmental workflows with suitable sensors, software, training and support.