Content deleted Content added
Link to Raymarine |
m replaced: etc) → etc.) (2), 5hz → 5 Hz (2), linking |
||
Line 1:
[[File:BVI 2009-273 (3692273152).jpg|right|thumb|A [[Raymarine]] chartplotter.]]
A '''Chartplotter''' is a device used in marine [[navigation]] that integrates [[GPS]] data with an [[
The chartplotter displays the ENC along with the position, heading and speed of the ship, and may display additional information from [[radar]], [[Automatic Identification System|automatic information systems (AIS)]] or other sensors.
Line 8 ⟶ 7:
==Technology==
Electronic chartplotters are by nature [[Central Processing Unit|CPU]] (and [[General-purpose computing on graphics processing units|GPU]]) intensive applications. Chartplotters need to retrieve the Navigation Signal ([[Galileo (satellite navigation)|Galileo]], GPS, [[GLONASS]], [[Wide Area Augmentation System|WAAS]] etc.) signal and overlay that on a map. Map updates on dedicated hardware typically have screen refresh rates from
Some navigation software can run on standard computers (and mobile phones, etc.) but most higher end systems are dedicated hardware. Especially when the chartplotter generates three-dimensional displays, as used for fishing, considerable processing power and video memory may be required.
As with all marine systems, chart-plotters generally are not used alone. In commercial ships, they are integrated into a full system of marine instruments that can guide the ship under any conditions. These other instruments include [[Sonar]] transducers, integration with 2 Way Radio communication devices and emergency locators ([[EPIRB]]).
Line 22 ⟶ 21:
ECDIS will use IMO-standardized formats, but some chartplotters require specific data formats. A charter may use one or both types of ENC:
* Raster Charts: The chart plotter displays a "picture" of a paper chart or map which is referenced to geographic coordinates. A [[GPS]] position can be displayed upon the raster chart, but accuracy depends upon many factors including the type of projection (e.g. conic or mercator) used in the original chart, and the reference system used (e.g. [[
* Vector Charts: The chart plotter constructs a facsimile of a chart using raw data from a data base. The major advantages are a reduction in the amount of data to be stored, and the ability of the chart plotter to identify certain features (such as water depth) and act upon them (e.g. do not allow the ship to run aground)
== Human Interfaces ==
A basic navigational display is common to all chartplotters. Depending on intended use and characteristics of the specific chartplotter, they may have options to present such displays as three-dimensional fish-finding and bottom characteristics useful in fishing.
These optional displays can be presented by commands to a single screen, causing the main display to be replaced with the one requested. Alternatively, chartplotters may offer split-screen modes on a single physical screen, or may support multiple physical displays.
Line 35 ⟶ 34:
The principal function of a classic chartplotter is assisting a human pilot to plot and follow a course.
Safety-related [[Automatic Identification System|Automatic identification systems (AIS)]], required on all passenger vessels and vessels of 300 tons and over, also assist in piloting, and can display on the chartplotter. AIS have collision avoidance, and avoidance of known hazards such as reefs, as their primary function. AIS depend on cooperative data communications among ships.
[[Vessel Traffic Service|Vessel traffic services (VTS)]] go even farther as safety systems, being analogous to the proactive function of air traffic control systems. VTS assist vessel traffic control in routing vessels in busy waters. Other vessel-based safety collision avoidance functions are [[Automatic Radar Plotting Aid| Automatic Radar Plotting Aids (ARPA)]], usually a component of the radar system or an accessory to it, and coupled with the radar system input to the chartplotter.
Line 44 ⟶ 43:
==External links==
*[https://web.archive.org/web/20110204030611/http://www.marinegpschartplotter.co.nz/ Marine GPS Chartplotter Info Centre]
[[Category:Navigational equipment]]
[[Category:Aids to navigation]]
| |||