FSI Receives 4th Order for the U.S. Navy’s DT-705/B CTD Sensor

Falmouth Scientific, Inc. announced that it has received its 4th quantity order from International Transducer Corporation (ITC) located in Santa Barbara, CA for the U.S. Navy’s DT-705/B. FSI, under a Teaming Agreement with ITC, designed, developed and tested the new unit, which replaces the current time-of-flight sound velocity sensor used on U.S. Navy submarines. The DT-705/B system uses a shock-hardened version of FSI’s patented non-external inductive conductivity sensor, which is now commercially available as the FSI NXIC CTD. The U.S. Navy units are rated Class A naval equipment, capable of meeting the Critical Item Product Specification and environmental requirements. (read more)
2005-06-16 12:00:00

5th U.S. Navy Order For FSI’s DT-705/B CTD Sensor

Falmouth Scientific, Inc received its 5th quantity order for the U.S. Navy’s DT-705/B sensor. FSI developed and tested the unit under a Teaming Agreement with International Transducer Corporation (ITC) for use as time-of-flight sound velocity sensor on U.S. Navy submarines. The DT-705/B system uses a shock-hardened version of FSI’s patented non-external inductive conductivity sensor, which is commercially available as the FSI NXIC CTD. The U.S. Navy units are rated Class A naval equipment, capable of meeting the Critical Item Product Specification and environmental requirements. (read more)
2006-05-12 12:00:00

Optimizing a Low-cost Multi Sensor System for Hydrographic Depth Determination

Surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years. With shallow water surveys not required to be performed with the accuracy and precision of industrial projects, surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. With this low-cost demand rising, the investigative development of these products has become a scientific research issue. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years. The Old Openseamap Project During a project with openseamap.org, a Multi Sensor System (MSS) including an Echo sounder, GPS and inertial measurement unit (IMU) was built up and tested. Despite... (read more)
2019-04-08 01:44:05

The Unknown Hydrophone and Transducer Supplier

Sensor Technology Ltd
Sensor Technology Ltd is a vertically integrated component manufacturer that produces piezoelectric ceramics and piezo-based acoustic transducers. Located in Collingwood, near Toronto, Canada, the company has grown steadily for nearly three decades. Perhaps not a widely recognised name, Sensor Technology Ltd provides piezoelectric ceramics, hydrophones and transducers to some of the largest companies in the oil & gas, defence and maritime industries.   < Niru Somayajula, President & CEO, Sensor Technology Ltd (Canada)   Sensor Technology Ltd (SensorTech) is a privately owned Canadian corporation started by a husband and wife team in 1983. The company's initial focus was piezoelectric ceramics and... (read more)
2010-09-13 02:57:14

Data Integration for Coastal Surveying

Combining Laser Scanner and Bathymetric Sensor
When surveying the coastline, the integration of bathymetric (below sea level) and laser scanning (above sea level) data causes problems due to the different imaging properties. However, by ensuring that the different data sets have been accurately georeferenced and oriented, a complete and accurate model of the terrain above and below sea level can be obtained. This technique was employed to survey the area of Portovenere in Italy, including the San Pietro church located on a steeply sloping rocky promontory, with positional accuracies in the order of 5cm.<P> View Larger Map One of the biggest issues incoastline survey is the... (read more)
2009-06-04 12:00:00

Navy Contract for Ocean Sensors

Falmouth Scientific, Inc. (FSI) has received an US$3.6 million, multi-year contract for supply of conductivity, temperature, depth (CTD) sensors from the U.S. Navy’s Naval Underwater Warfare Center (NUWC) in Newport (RI, USA). The DT-705 sensors are installed on submarines to monitor the surrounding environment. Ocean conductivity, temperature, and depth measurements provided by the sensor are also used to calculate sound velocity, salinity, and density for use in weapons targeting and submarine buoyancy determination. FSI has supplied over 150 DT-705 CTD sensors to the Navy under previous contracts. Sensors supplied under the new contract will be used to instrument Los Angeles... (read more)
2007-05-04 12:00:00

Coastal and Littoral Studies

A Multi-Sensor, Multi-Discipline, Multi-Partner Approach
For more than a decade, coastal zone studies, including hydrographic survey-based mapping, have been growing in size, complexity and applications. With the growing need to better baseline and define the impacts of sea level rise, programmes are now combining many diverse sensors and data to best map the areas and provide exceptionally high-quality precise information for predictive models. To a large degree, this is a direct result of the continuously expanding success of these programmes. Success can be measured in terms of data quality, performance and the expanded applications to stakeholders and other users, and directly measurable by the accuracy... (read more)
2013-07-12 02:39:15

World's First Fully Autonomous Hydrographic Survey

No Line Plan, No Boat Crew, Just Sensors
During September 2017, the world’s first autonomous hydrographic survey was performed. 'Autonomous' means not by remote control, but rather that the autonomous surface vehicle (ASV) used guidance from survey software to run pre-planned survey lines or automatically generated lines based on sonar coverage, with human interaction possible but not required. The Channel Coastal Observatory (CCO) commissioned 4D Ocean to undertake a hydrographic survey of the seabed offshore of Hurst Spit, Western Solent, using a SeaRobotics ASV 2.5. The pilot survey was supported by the Maritime & Coastguard Agency (MCA) and UK Hydrographic Office (UKHO). By Duncan Mallace, contributing editor, Hydro... (read more)
2018-02-13 11:36:29

Recent Developments in Airborne Lidar

Multispectral Laser Scanning, Single-photon Lidar, Hybrid Sensors and UAVs
The arrival of airborne Lidar, also referred to as airborne laser scanning (ALS), has revolutionized area-wide 3D data acquisition of topography, bathymetry, vegetation, buildings and infrastructure. This article presents an overview of the progress made since then in both sensor and aircraft technology. It also highlights how ongoing miniaturization has recently enabled the application of Lidar on unmanned aerial vehicles (UAV), resulting in ultra high-resolution 3D point clouds with centimetre precision. From Single to Multiple Pulses in the Air Current trends include a steady increase in the measurement rate, achievements in full-waveform processing, the spread of multispectral and topo-bathymetric laser... (read more)
2019-04-19 01:19:15

Subsea Autonomy is Moving Beyond Waypoints

Underwater an AUV Must Rely Upon its Own Sensor Network
The AUV has been the tool of choice for shallow-water MCM and EOD operations for a number of years. The coverage by popular news channels of unfortunate events, such as the MH370 tragedy, has also shown that the AUV has undisputedly become the tool of choice to carry out salvage operations at extreme depths. The AUV has no physical link to the surface and the majority of missions are still pre-programmed by a human, which can be time consuming and error prone. Missions are normally a sequence of defined waypoints where the AUV may be required to carry out certain... (read more)
2020-06-09 09:41:02
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