Vessel Traffic Data and Analysis What is AIS

Vessel Traffic Data and Analysis

What is AIS? • • • Automated Identification System (AIS) Vessel Identification and Tracking System – Based on GPS and VHF Broadcasting Required on all Vessels over 300 GT (1) Provides Situational Awareness in Real Time (collision avoidance etc. ) (2) Collected data produces a historical archive of Vessel Traffic for the Entire Coast.

NAIS Overview

Shipboard AIS

AIS Analysis Input Data AIS Returns for 2009 n Monthly Data for Atlantic – Maine to Florida n Each Month is Clipped by Protraction, then Merged n AIS Analysis Input Includes all Months for 2009 n June is missing 25 days of data for 2009 n

AIS returns – January 2009

AIS returns – Vessel Data

AIS returns – Vessel Data

AIS returns – January 2009

AIS returns – All Months 2009

AIS returns – July 2009

AIS returns – All Months 2009

Vessel Speed and AIS Point Density

AIS Density Mapping Quantify unique vessels (MMSI) passing through each leasing unit (aliquot) per year. n Extract deep draft vessel types for depicting traffic volume for larger vessels. n Other mapping includes avg. vessel time in aliquot, avg. speed, etc. n

OCS Blocks – 2. 6 nm x 2. 6 nm, Aliquots (sub-blocks) -. 65 nm x. 65 nm

Filtering by Date to Remove Duplicate Returns

Extracting Vessels by Deep Draft Type Cargo Vessels, Tankers, Tugs, Towing > 200 m n Comparison of unique traffic patterns by type. n Maps use a more sensitive color scale to display lower volume types. n

Vessel Traffic Data and Analysis