PD Teesport go for Vector Sensor

Saderet Ltd, the European distributor for CSI Wireless have supplied seven Vector Sensor GPS compass systems to PD Teesport. The Vector Sensor provides sub-half degree heading, and sub-meter navigation data for use on 7 of PD’s vessels that provide the following wide range of port services: The Tees Harbour Launch and Tees Surveyor acquire hydrographic survey data The Heortnesse and Cleveland County are trailer suction dredgers The Seal Sands is a grab dredger, whilst the Wilton is the buoy tender vessel The Seaton is engaged in general workboat duties The Vector Sensor offers multiple source differential input including IALA beacon... (read more)
2004-07-23 12:00:00

Marine Construction Receivers

Trimble has introduced two new Global Positioning System (GPS) receivers designed specifically for marine construction applications: the Trimble SPS361 and Trimble SPS461 GPS Heading Receivers. These dedicated marine receivers deliver both precise GPS heading together with Differential GPS (DGPS) or Real Time Kinematic (RTK) positioning.   The receivers are developed for a range of applications when used with Trimble HYDROpro marine software, including: the precise placement of structures such as piles, bridges, caissons, marinas, and coastal defenses; dredge head positioning; vessel positioning and tracking; and offshore rig positioning with anchor handling.   The Trimble SPS361 is an entry-level DGPS Heading... (read more)
2009-03-12 11:04:44

Long-range AUV Passes First Trials

Autosub Long Range has successfully completed its first set of sea trials at a location in the deep Atlantic Ocean, 300 miles south-west of the Canary Islands. Hosted by research ship the RRS Discovery, this is the latest in the Autosub series of autonomous underwater vehicles (AUVs), . Autosub Long Range is a new type of AUV developed at the National Oceanography Centre (NOC) in Southampton, UK. By travelling rather slowly (0.4 metres per second), and keeping a tight rein on the power available to its sensors, it will be capable of missions of up to six months duration and... (read more)
2011-03-11 01:50:42

Two New INS Solutions Launched

Two separate Inertial Navigation Systems are arrived at CDL during at this year’s Ocean Business event in Southampton, UK. The MiniPOS3 and MiniSense2 offer INS solutions to suit either end of the cost - performance spectrum.   CDL’s most advanced system ever, the MiniPOS3, is a full Inertial Navigation System (INS) providing highly accurate heading, pitch and roll alongside multiple aiding options including USBL, LBL, DVL and GPS to provide a positioning solution that eliminates almost all of the inherent noise and availability issues of traditional positioning systems. Developed from the successful MiniPOS2 system the addition of USBL/LBL aiding provides... (read more)
2011-04-06 03:44:56

Jasco Amar Mission to Venus Ocean Observatory

JASCO Applied Sciences has commenced an AMAR product demonstration and data gathering mission on the Venus Ocean Observatory. Two of JASCO’s AMARs have been deployed at two different locations on the Venus Ocean Observatory in the Strait of Georgia, Canada. The primary purpose is to demonstrate the multi-sensor, real-time data collection and streaming capability of JASCO’s AMAR product. Of specific interest to JASCO are the real-time detection, identification and localisation of individual southern resident killer whales. The AMAR is JASCO’s product offering for the real-time collection and delivery of data and information for ocean observing. AMAR enables scientists to collect... (read more)
2014-03-17 02:29:01

Rugged FOG-based INS for Demanding Autonomous Applications

KVH Industries, USA, has introduced the GEO-FOG 3D inertial navigation system (INS) offering roll, pitch, and heading accuracies of .05° for demanding applications in unmanned, autonomous, and manned aerial, ground, marine, and subsurface platforms, such as subsea remotely operated vehicles (ROV) or mining systems. The GEO-FOG 3D is based on the company’s high-performance fibre optic gyro (FOG) technology combined with centimetre-level precision RTK GNSS receivers and advanced sensor fusion algorithms. The result is a solution that continuously provides fast, ultra-accurate position, velocity, and attitude measurements that keep applications operating no matter how challenging the conditions. The core inertial sensor for... (read more)
2016-01-14 11:39:05

Innovative Solutions and Proactive Approaches

CEDA’s Iberian Conference 2016
At the end of October 2016, the Central Dredging Association (CEDA) co-hosted a conference with the Portuguese Engineers Association (OE) in Lisbon, Portugal. The CEDA Iberian Conference: Dredging for Sustainable Port Development attracted over 120 participants and addressed key topics relevant to the success of port dredging and sediment management projects, with a focus on the Iberian Peninsula. On behalf of the co-organiser, Mr Carlos Loureiro, OE vice-president, stressed that the shared objectives, of the creation and dissemination of high-quality knowledge, made CEDA and OE ‘natural’ partners in presenting the event. Comprehensive Programme The conference started with a short introduction... (read more)
2016-11-22 08:50:23

Technology in Focus: Inertial Navigation Systems

Bridging the Positioning Gap
Inertial Navigation Systems (INSs) are a great help in applications where either position stability is of great importance or where bridging (small) positioning gaps is a requirement. To understand INS, imagine you are standing blindfolded in the centre of a long hallway. Then you start walking. You may proceed quickly at first, compensating as needed and covering ground with confidence. Eventually, however, you begin to lose your sense of alignment. This ability to successfully navigate when denied a visual frame of reference, even for a relatively short amount of time, represents our own basic human form of inertial navigation. An... (read more)
2016-08-25 11:33:17

Dynamic Calibration of ­Navigation Sensors Using GNSS Technology

New on the move approach of calibration for vessel navigation sensors
Over the years there has been a requirement to calibrate navigation (heading and motion) sensors and verify DGNSS systems on vessels working in the offshore oil industry. These calibrations are a requirement of oil companies and need to be undertaken prior to commencement of a project and/or at regular intervals throughout a project. This article covers the techniques and accuracies related to applying GNSS technology to vessel sensor calibration and verification. Historically, vessel sensor calibrations have been undertaken in port using traditional land survey techniques, where the vessel is moored alongside a quay. The current advances made in GNSS technology... (read more)
2013-09-06 03:37:40


For nearly two years the sales team at VT TSS had been receiving orders for a combined installation of its Meridian gyro-compass and its Dynamic Motion Sensor (DMS). It was, therefore, suggested to VT TSS that it would be easier if the two units could be combined in one box. They would be easier to install and easier to use, and so the company developed the Meridian Heading and Attitude System (MAHRS). One notable new attribute is the deck plane correction, which was made possible by the use of an internal algorithm that can correct the gyroscope with highly accurate... (read more)
2003-10-23 12:00:00
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