scholarly journals Implementation of Automatic Identification System (AIS) for Evaluation of Marine Traffic Safety in Strait of Malacca using Analytic Hierarchy Process (AHP)

2012 ◽  
Vol 16 (0) ◽  
pp. 141-153 ◽  
Author(s):  
Muhammad Badrus Zaman ◽  
Eiichi Kobayashi ◽  
Nobukazu Wakabayashi ◽  
Trika Pitana ◽  
Adi Maimun
Keyword(s):  
Analytic Hierarchy Process ◽  
Traffic Safety ◽  
Automatic Identification ◽  
Identification System ◽  
Analytic Hierarchy ◽  
Automatic Identification System ◽  
Marine Traffic ◽  
Hierarchy Process ◽  
Strait Of Malacca

scholarly journals Estimating the Speed of Ice-Going Ships by Integrating SAR Imagery and Ship Data from an Automatic Identification System

2018 ◽  
Vol 10 (7) ◽  
pp. 1132 ◽  
Author(s):  
Markku Similä ◽  
Mikko Lensu
Keyword(s):  
Mean Squared Error ◽  
Forest Tree ◽  
Automatic Identification ◽  
Identification System ◽  
Automatic Identification System ◽  
Marine Traffic ◽  
Ice Drift ◽  
Random Forest Tree ◽  
Ice Conditions ◽  
Sar Imagery

The automatic identification system (AIS) was developed to support the safety of marine traffic. In ice-covered seas, the ship speeds extracted from AIS data vary with ice conditions that are simultaneously reflected by features in synthetic aperture radar (SAR) images. In this study, the speed variation was related to the SAR features and the results were applied to generate a chart of expected speeds from the SAR image. The study was done in the Gulf of Bothnia in March 2013 for ships with ice class IA Super that are able to navigate without icebreaker assistance. The speeds were normalized to dimensionless units ranging from 0 to 10 for each ship. As the matching between AIS and SAR was complicated by ice drift during the time gap (from hours to two days), we calculated a set of local statistical SAR features over several scales. Random forest tree regression was used to estimate the speed. The accuracy was quantified by mean squared error and by the fraction of estimates close to the actual speeds. These depended strongly on the route and the day. The error varied from 0.4 to 2.7 units2 for daily routes. Sixty-five percent of the estimates deviated by less than one speed unit and 82% by less than 1.5 speed units from the AIS speeds. The estimated daily mean speeds were close to the observations. The largest speed decreases were provided by the estimator in a dampened form or not at all. This improved when the ice chart thickness was included as a predictor.

The Application of Analytic Hierarchy Process in Delimiting Congestion Charging Area

2014 ◽  
Vol 644-650 ◽  
pp. 5853-5856
Author(s):  
Ya Yi Rong
Keyword(s):  
Analytic Hierarchy Process ◽  
Traffic Safety ◽  
Traffic Congestion ◽  
Evaluation Index System ◽  
Evaluation Index ◽  
Analytic Hierarchy ◽  
Passage Efficiency ◽  
Congestion Charging ◽  
Hierarchy Process ◽  
Main Factor

Traffic congestion is the main factor which restricts urban development. It causes hazards to city such as environmental pollution, energy loss, the decline of road passage efficiency and traffic safety. Through practice shows aboard, congestion charge is an effective method to solve the problem. Based on the Analytic Hierarchy Process (AHP), congestion charging area is delimited in the paper. The factors impact delimiting charging area is analyzed, and an evaluation index system is built up. Taking a city as an example, results indicate that traffic volume is the most important factor when definite the charging area.

ESTIMATION OF EXHAUST SHIP EMISSION FROM MARINE TRAFFIC IN THE STRAITS OF SINGAPORE AND BATAM WATERWAYS USING AUTOMATIC IDENTIFICATION SYSTEM (AIS) DATA

2015 ◽  
Vol 77 (23) ◽  
Author(s):  
Hendra Saputra ◽  
Mufti Fathonah Muvariz ◽  
Sapto Wiratno Satoto ◽  
Jaswar Koto
Keyword(s):  
Exhaust Emission ◽  
Automatic Identification ◽  
Identification System ◽  
Exhaust Gas ◽  
Emission Rates ◽  
Gas Emission ◽  
Automatic Identification System ◽  
Marine Traffic ◽  
Exhaust Gas Emission ◽  
Ship Emission

This study focuses on the Strait of Singapore and Batam Waterways area because it is one of the world’s most congested straits used for international shipping. The study aims to estimate exhaust gas emission and the concentration of emission to several areas around the strait. This is accomplished by evaluating the density of shipping lanes in the strait by using the data which obtained by Automatic Identification System (AIS). MEET methodology is used to estimate emissions from ships. There were 1269 total number of ships through the strait on September 27, 2014 at 06.00 am-08.00 am produces total exhaust emission for NOx, CO, CO2, VOC, PM and SOx were about 12595.35 g/second (15.99%), 25725.19 g/second (32.66%), 11832.31 g/second (15.02%), 5973.23 g/second (7.58%), 443.71 g/second, (0.56%), 22185.57 g/second (28.17%), respectively. The ships under the Singapore flag contribute approximately 22.78% of total emissions in the Strait of Singapore and Batam Waterways followed by Panama, Indonesia and Malaysia 14.47%, 3.67%, 1.91%, respectively. Based on the total emission rates hips under Indonesia and Malaysia rank of seventh and eighth respectively.

scholarly journals Navigation Safety for Marine Traffic in the Malacca Strait using AIS Data

2019 ◽  
Vol 7 (4) ◽  
Author(s):  
Muhammad Badrus Zaman
Keyword(s):  
Traffic Safety ◽  
Traffic Management ◽  
Automatic Identification ◽  
Identification System ◽  
Maritime Traffic ◽  
Marine Traffic ◽  
International Regulations ◽  
Ship Safety ◽  
Malacca Strait ◽  
Navigation Safety

The Malacca Strait experiences high-density vessel traffic, and therefore is a busy area with high potential for collisions. Analyses of marine traffic that reflect the real conditions of ship navigation are performed to enhance maritime traffic safety. An automatic identification system (AIS) allows for the accurate investigation of actual ship encounters, ship collisions, and sea traffic management systems. For this study, an AIS receiver installed at the Universiti Teknologi Malaysia (UTM) provided AIS data, which focused on a selected area in the Malacca Strait. The 1972 International Regulations for Preventing Collisions at Sea (COLREG) guided the assessment of navigation safety based on real conditions using AIS and geographic identification systems (GIS). Based on estimates of the probability and consequence indices from a risk matrix, the time and encounter conditions determined the level of risk. This study also conducted safety measurements. The analysis indicated that ship safety would improve significantly if the vessels followed the guidelines established in this study

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