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Study of synthetic aperture radar and automatic identification system for ship target detection

Courtesy: ScienceDirect
Sudhir Kumar Chaturvedi

Highlight
• In the past, the main goals of Synthetic Aperture Radar (SAR) systems were the study of the interaction of electromagnetic waves with the earth surface.

• Recently, the development of multi-channel SAR systems has enabled the development of more sophisticated techniques for the surveillance activities.

• SAR is the most efficient instrument, which provides high-resolution data for wide ocean area surveillance under all weather conditions. The intrinsic capability of this instrument is to provide a quick view of the oceanic surface features such as vessels, waves and currents, oil spills, laver facilities and wind fields.

• The ship detection/recognition is achieved in two steps: the first step is to identify the ship in SAR images of a busy traffic, which corresponds to Automatic Identification System (AIS) signals by the “dead-reckoning (DR) position”, and the second step is to estimate the position, size and speed of the ship from SAR images and compare these results with the AIS “true” data.

Abstract
In the past, the main goals of Synthetic Aperture Radar (SAR) systems were the study of the interaction of electromagnetic waves with the earth surface. Recently, the development of multi-channel SAR systems has enabled the development of more sophisticated techniques for the surveillance activities. SAR is the most efficient instrument, which provides high-resolution data for wide ocean area surveillance under all weather conditions. The intrinsic capability of this instrument is to provide a quick view of the oceanic surface features such as vessels, waves and currents, oil spills, laver facilities and wind fields. The ship detection or recognition is achieved in two steps: the first step is to identify the target in SAR images of a busy traffic, which corresponds to Automatic Identification System (AIS) signals by the “dead-reckoning (DR) position”, and the second step is to estimate the position, size and speed of the ship from SAR images and compare these results with the AIS “true” data. This paper presents the fundamentals of SAR and its integration with the AIS data for the ship target detection.
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The Importance of Vessel Tracking System

Courtesy: Marine Insight
By Raunek | In: Marine Navigation, Marine Safety | Last Updated on March 1, 2019

These days one can effectively track and monitor everything that one wishes to. A vessel tracking system, as the name suggests is a collection of equipments which enable marine and naval vessels to track, identify and monitor a ship’s position, location and any other detail that might be important in maneuvering and stabilizing a ship’s route and course.
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A Multi-Feature and Multi-Level Matching Algorithm Using Aerial Image and AIS for Vessel Identification

Courtesy: MDPI
Received: 30 October 2018 / Revised: 10 March 2019 / Accepted: 11 March 2019 / Published: 15 March 2019

Abstract
In order to monitor and manage vessels in channels effectively, identification and tracking are very necessary.

This work developed a maritime unmanned aerial vehicle (Mar-UAV) system equipped with a high-resolution camera and an Automatic Identification System (AIS).

A multi-feature and multi-level matching algorithm using the spatiotemporal characteristics of aerial images and AIS information was proposed to detect and identify field vessels.
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Spree-Oder waterway becomes a digital test field

Courtesy: DVZ (translated from German)
March 08, 2019

The Spree-Oder Waterway (SOW) is to become a digital testing ground for autonomous and automated inland navigation. From July, a project Autonom-SOW with partners from industry, federal government and science, said the Federal Association of Public Inland Ports (BÖB) on Friday. After initial investigations, construction is to begin in 2020. The test field at the SOW is one of four projects under the action plan “Digitalisation and Artificial Intelligence in Mobility” of the Federal Ministry of Transport.
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Wärtsilä Vessel Traffic Service solutions to increase efficiency of two Portuguese ports

Courtesy:Hellenic Shipping News
Port News 07/03/2019

The technology group Wärtsilä has successfully completed the installation and operational staff training for its Vessel Traffic Service (VTS) solution in the ports of Lisbon and Setúbal / Sesimbra in Portugal. The systems will increase the efficiency of these ports by reducing waiting time for vessels and allowing just-in-time pilotage. The state-of-the-art solution has been developed and supplied by Transas, a Wärtsilä company. The project was booked in July 2018 and completed in January 2019.
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Minister to unveil first data from ZACube-2

Courtesy: SA News.gov.za
Sunday, February 24, 2019

The first real-time data from South Africa’s ZACube-2 nanosatellite will be unveiled on Tuesday, according to the Department of Science and Technology.

The continent’s most advanced nanosatellite to date, the ZACube-2 was successfully launched into space in December. It is expected to provide cutting edge remote sensing and communication services to South Africa and the region.
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Morse Code – Forerunner of Digital Communication

Very few people will recognise these devices and technology today.

Beginning in 1836, the American artist Samuel F. B. Morse, the American physicist Joseph Henry, and Alfred Vail developed an electrical telegraph system. This system sent pulses of electric current along wires which controlled an electromagnet that was located at the receiving end of the telegraph system.


Courtesy: Australian Maritime Safety Administration

Vibroplex brand semiautomatic key (generically called a "bug")

An important application is signalling for help through SOS (Save Or Souls), ” . . . _ _ _ . . . “. This can be sent many ways: keying a radio on and off, flashing a mirror, toggling a flashlight, and similar methods. SOS is not three separate characters, rather, it is a prosign SOS, and is keyed without gaps between characters.


A U.S. Navy signalman sends Morse code signals in 2005.

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Upcoming articles in this blog will include information about AIS (Automatic Identification System), VDES (VHF Data Exchange System), AIS Transponders / Transceivers, AIS Class A, AIS Class B, AIS Base Stations, AIS AtoN (Aids to Navigation), AIS SART (Search and Rescue Transmitter), Vessel Traffic Service (VTS), Vessel Traffic Management Information System (VTMIS), AIS Satellite, Global Maritime Distress and Safety System (GMDSS), Digital Selective Calling (DSC), Marine VHF Radio, Homeland Security, Exclusive Economic Zone (EEZ), cargo payload, draught, capacity utilisation, maritime big data, bulk shipping, line-up reports, trade flow, commodity, satellite, naval architecture, fishing, sar, security, synthetic aperture radar, visible infrared imaging radiometer suite (viirs), vessel tracking, ship tracking, communication and other related issues.

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exactEarth deploys final six satellite payloads

Friday, 15 February 2019
exactearth ais satellites

exactEarth a provider of Satellite AIS data services, has announced that the final six payloads for its second-generation constellation, exactView RT, are now in operation. This completes the roll-out of the first global real-time Satellite-AIS service with a total of 58 operational satellite payloads and seven orbital spares.
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top-8-websites-to-track-your-ship

Courtesy: Marine Insight
By Mohit | In: Know More | Last Updated on February 9, 2019

The rapid advancement of technology has significantly improved the methods of monitoring and tracking the ships in the recent past. The fast-developing satellite services have enabled the ship tracking across the globe easier now and thus ensuring the safety of vessels from various threats.

With the help of satellite-based vessel monitoring systems (VMS), different types of vessels have been monitoring efficiently by marine agencies and vessel owners for a long period. The automatic identification system (AIS) helps track bigger vessels crossing waters across the world by offering real-time information about the vessels.

Currently, several websites provide ship tracking using the automatic identification system to display the real-time location of the ships.
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Maritime safety breakthrough at IMT

Courtesy: defenceWeb

Maritime Security
Written by defenceWeb – 11th Feb 2019

IMT_HQ_Simons_Town
The Institute for Maritime Technology headquarters in Simons Town.

Armscor’s Institute of Maritime Technology (IMT) has made a significant breakthrough in the field of maritime safety and communications by installing the world’s first VDES base station, which allows significantly faster data transfers to and from ships, improving safety and maritime awareness.

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