Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 29-07-2013, 00:14   #1
Registered User
Gilletarom's Avatar

Join Date: Mar 2010
Location: France
Boat: 10.50 mètres
Posts: 2,079
ARPA Target

Hello All,

What is an ARPA target ?

Is it this kind : "Automatic Radar Plotting Aid" ?

Thank by advance.

B.R. Gilletarom
Gilletarom is offline   Reply With Quote
Old 29-07-2013, 05:26   #2
Moderator Emeritus
GordMay's Avatar

Cruisers Forum Supporter

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 29,337
Images: 240
Re: ARPA Target

ARPA (Automatic Radar plotting Aid)

The MaxSea AIS/ARPA function explained | MaxSea
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"

GordMay is offline   Reply With Quote
Old 29-07-2013, 06:50   #3
Senior Cruiser
sinbad7's Avatar

Cruisers Forum Supporter

Join Date: Sep 2003
Location: Ubatuba,SP,Brazil (Ex Norway)
Boat: (Ex) Alu. 60' yacht-"Eight Bells"
Posts: 2,697
Images: 57
Send a message via Skype™ to sinbad7
Re: ARPA Target

Experimentally,coastal stations also include radar targets within their range and transmit their positions together with AIS targets over the internet, which can be accessed by f.ex. Marine Traffic URL/software. OK, if you have a long range WiFi antenna.

Radar is today the main sensor of the VTS to detect a ship.
The VTS radar has almost the same errors in range and bearing
resolution as all other radar’s, although it has a known position
and is North oriented without the errors of a compass involved.
The limitations, of the ARPA radar to track ships due to target
swap to land, beacons, bridges and other ships, makes the tracking
facility in the ARPA rather limited.

VTS’s are today limited to track ships, for instance, in a bay
or when approaching a harbour from sea. There is a require-
ment for improving of the VTS to be able to:

A) Cover areas where radar coverage is almost impossible to
achieve, like rivers and archipelagos

B) Identify radar blips on the VTS radar automatically.

C) Interrogate ships for information regarding type of cargo

D) Track with a high up date rate, the ferry going between two
ports in the bay or a river continuously, without needing to
do it every time the radar tracking has swapped to another
target or, when the ferry has been moored to a pier or passed
too close to a beacon or a passing ship

* Know which port a ship is bound for.

* Know the size and the draft of ships in the vicinity.

* Detect a change in a ship’s heading almost in real time.

* Identify slowly moving targets, like log rafts, sounding arrays
etc., which are unable to take rapid evasive actions.

The only AIS solution, that could solve all the requirements
of the VTS, is a high update rate, mode AIS, with interrogating

The establishment of a landbased AIS reception network,
may actually mitigate the need for VTS in some areas. The cost
of installing and maintaining an AIS network is minute com-
pared to a VTS radar net-work.
"And all I ask is a tall ship and a star to steer her by."
sinbad7 is offline   Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:40.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.