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Easytrak Alpha 2665 & Alpha Portable 2655

Easytrak Alpha is the introductory and most compact version of the applied acoustics’ range of tracking systems that use a vessel mounted transducer array to calculate the position of a subsea target equipped with an acoustic beacon.

Ideally suited for small subsea vehicle operations or diver tracking, the Alpha is a condensed and cost effective system for monitoring close range subsea targets.

Easytrak Alpha Portable is the compact, carry-on version of the applied acoustics range of lightweight USBL tracking systems that use a vessel-mounted transducer array to calculate the position of a subsea target equipped with an acoustic beacon.

Quick to deploy, the Alpha Portable USBL system is ideally suited for small subsea vehicle operations or diver tracking.

Speak to an expert Download Alpha 2665 data sheet Download Alpha Portable 2655 data sheet

Key Features

Compact USBL system
Rapid deployment
Simple to use
Cost-effective

Applications

Underwater survey and inspection
Cable and pipeline route surveys
Nearshore construction and salvage
Marine archaeology

Technical Specification

Easytrak Alpha Console, Model 2665

Dimensions

Console: 255 x 60 x 315mm, excluding cables

Weight

Console: 2.6kg approx

Power Supply

Input: 115Vac – 230Vac 47-63Hz typically 2A

Console Input: 12-18Vdc up to 2A depending on input dc voltage

Communications

2 x RS-232 (1) External GNSS + Heading and (2) Data Out

1 x GNSS Antenna Connector

All RS232C inputs comply with EIA (Electronics Industry Association)

RS232C standard

1 x USB connection to external PC

Internal GNSS Receiver

SiRF Star lll Chipset Receiver

<10m, 2D RMS <5m 2DRMS, SBAS (WAAS, EGNOS, MSAS…) corrected

External GNSS/Heading

GNSS NMEA messages: GGA and RMC

Heading NMEA messages: HDT, HDG, HDM

Data Output

AAE, TP-EC W/PR, $PSIMSSB, $PSIMSNS, $GPRMC,

Sonar SSS – $GPGGA (Vessel position),

$GPVTG (Vessel track and speed)

$GPTLL (Target position)

Data logging to HD

Beacon Types

Transponders and Responder (1)

Channels

4 displayed from 35 pre-defined

Interrogation Interval

1, 2, 4 or 8 second intervals

Responder Output

Positive 12V pulse 5ms long. BNC connector

Operating Temperature

-5 to 30°C

Storage Temperature

-5 to 45°C

Transducer, Type ETM 904C

ETM 904C

Dimensions

Transducer: 291mm long x 78.5mm diameter

Weight

Transducer: 3.94kg in air, 3.0kg in water approx

Depth rating

30m

Transducer Housing Material

A4 stainless steel

Operating Temperature

-5 to 30°C

Storage Temperature

-5 to 45°C

Deck Cable

12.5mm diameter, yellow polyurethane sheathed. Standard length 20m

Accuracy / Performance

Slant Range Resolution

10cm

Position Accuracy*

2.0° RMS, 3.0% of slant range. Excluding effects due to GPS error, incorrect VOS, ray bending, compass, pitch and roll effects, and acceptable S/N ratio

Transducer

MF frequency band

Transducer beam pattern

Hemispherical

Interrogate SPL

Typically 186 re. 1µPa@1m

Heading Sensor Accuracy

<0.5° RMS

Tilt Sensor Accuracy

Accuracy ± <1.0° RMS

Range ± 80°

*Optional higher accuracy calibration