Recent News


Sub-bottom Profiler Used for Pipeline Location

eTrac was contracted to locate a pipeline submerged approximately 15ft below the seafloor in the San Francisco Bay. A Teledyne Benthos Chirp III sub-bottom profiler was mobilized on SV Pulse for high resolution sub-surface imagery. An R2 Sonic 2024 running at 400khz was used to image subsea diffusers as well

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BEAMS in the Bay

eTrac hosted 8 students from the College of Charleston’s BEAMS (BEnthic Acoustic Mapping and Survey) Program to conduct a survey of Raccoon Strait in the San Francisco Bay. The students were able to learn and assist in the survey set up and acquisition, gaining valuable hands-on experience. Students in the

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San Francisco Bay Bridge

Multibeam hydrographic surveys have been conducted around a pier of the San Francisco Bay Bridge in preparation for further bridge deconstruction.    

SV Pulse

SV Pulse

ETrac’s 7th vessel named and mobilized to survey. The 24’ Aluminum Hydrographic Survey Vessel purchased in Dec 2013 has been name “The Pulse”. She has been set up with an R2Sonic 2022 and an Applanix PosMV Positioning and Motion System. She has been used as our main survey vessel in

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Google Earth Oblique View 1

Alaska Multibeam Hydrographic Survey and RTK GNSS Topographic Survey

eTrac is the prime contractor for a 3-year hydrographic survey contract with the US Army Corps of Engineers, Alaska district.  A recent Port Condition Survey was conducted in Unalaska, Alaska.  The survey was conducted in June, 2014 and involved multibeam hydrographic surveys, RTK GNSS topographic surveys, a static GNSS control

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Multibeam data collected in the Oakland Federal Channel.

Dredging Season Begins

This month marked the start of a busy season for dredging in the San Francisco Bay. eTrac is currently working on multiple projects related to port, marina, and channel maintenance. eTrac works closely with the dredging contractors and the US Army Corp of Engineers to complete pre, post and conditional

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Awarded 5 Year NOAA Surveying Services Contract

eTrac Inc. has been awarded a 5 year contract to assist NOAA in the updating of nautical charts. NOAA Announces Award of New Hydrographic Surveying Services Contracts


Alaska Pipeline Mapping and Inspection

Twin Pipelines Mapped in Alaska with Ultra High Resolution Multibeam Sonar    


Awarded USACE Alaska IDIQ AE Contract for Hydrographic Survey

eTrac is added as a USACE prime contractor for coastal surveying services for the Alaska district. Contract performance period is 3 years with broad geographic coverage in the state. We are excited and honored to be added to this contract. eTrac supports USACE with hydrographic surveying services in various USACE districts.


Modeling Pile Locations from High Resolution Multibeam Data

Multibeam data was collected using an R2 Sonic 2024 coupled with an Applanix PosMV Position and Motion system. Modeling was performed in AutoCAD Civil 3D. The data will be used to assist engineers in a seismic upgrade to the pier scheduled for 2015.