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Official OpenCPN Homepage

Official OpenCPN Homepage
A Chartplotter and GPS Navigation Software. OpenCPN is a free software (GPLv2) project to create a concise chart plotter and navigation software, for use underway or as a planning tool. OpenCPN is developed by a team of active sailors using real world conditions for program testing and refinement. The most recent stable version, OpenCPN 4.4.0, was published on 13 June 2016 and can be downloaded from opencpn.org/ocpn/download.What is new in 4.4.0? Features Worldwide, standard, S57 and encrypted S63 vector chart support. Platforms * Windows XP SP3 , Vista, 7, 8, 8.1 and 10 * Linux, BSD, Solaris * Apple Macintosh OS X Participate OpenCPN is under active development, and we are always looking for contributions such as: The OpenCPN original FAQ Not everyone can contribute with code, but please consider helping out financially. It'easy to donate through PayPal. It's also possible to find a donate button in OpenCPN. Locate and press in the toolbar. Press the "Donate" button and follow the instructions. Related:  NMEACartographie / SIGMarine Research

Phrases NMEA APB - La phrase Autopilote format B est envoyée par certains gps pour permettre aux utilisateurs d'utiliser un système de contrôle du pilote automatique. Cette phrase contient des informations d'alertes. (cross-track-error, waypoint arrival status, initial bearing from origin waypoint to the destination, continuous bearing from present position to destination and recommended heading-to-steer to destination waypoint for the active navigation leg of the journey.) Nota bene : Certains pilotes automatiques comme les Roberson, interprètent l'expression "Relèvement de la destination, vue de l'origine" comme "Relèvement de la destination vue de position actuelle".

Mkmap SEA RENDERING This is Mark II of the Whirligig project code name SEA RENDERING (it’s not actually a code name, just an anagram for my name :-) ) The purpose of this robot is to have it log water depths along a predefined set of waypoints. It stores its data on memory sticks or on SD cards. The estimated runtime is about 24 hours and with a top speed of 3km/h it will travel roughly 72km. With a log entry for every 10m this would give us over 700 depth measurements with full GPS reference. Most of the control system has been moved from the original Whirligig to save cost and time. The hull was designed in the free version of DELFTship and built this winter. The original plan was two hulls working in pairs as a catamaran with a solar panel on top. Some images from the hull build Adding fiberglass to one half of the mould Mould completed The first casting Here are some pictures from the complete robot Transducer Polymorph beddings for the batteries

Medieval and Twentieth Century Navigation The animation above depicts the means Columbus and mariners of the fifteenth century determined their location on the sea. They used simple arithmetic and a technique called Dead Reckoning Navigation. (Actually, Columbus judged the ship's speed through his own version of dead reckoning. Knowing the time elapsed between changes in his vessel's speed and direction of travel, Columbus entered his estimate of distances in a log. Rather than using a float to determine speed, Columbus, from his "feel" of the keel moving through the water along with his sense of wind and sail behavior, "knew" fairly accurately what the ship's speed was.) Here's how it worked: First of all, the navigator had to collect some articles to make a system which could "dead-reckon". Items Above Comprised Dead Reckoning Navigation The Process From arithmetic, we know that distance traveled in a selected direction is determined by multiplying speed by the time the vehicle travels at the chosen speed. Questions:1. 2. 3.

NMEA 2000 CAN Marine Interface Description, NMEA 2000 Pin Out, and Signal Names. An implementation of the Controller Area Network in a marine environment. Serial Data Networking of Marine Electronic Devices NMEA 2000 Bus Description The NMEA Standards Committee developed the NMEA 2000 interface which is based on the electrical CAN Bus [ISO 11898-2 as physical layer]. The higher-layer protocol is based on J1939 and ISO 11783. The NMEA-2000 interface is a Balanced (differential) 2-wire interface running over either a Shielded Twisted Pair round cable, including power and ground. NMEA-2000 Bus Electrical Interface Circuit One data rate is defined at 250kbps (Bits per second) being the top end. The CAN Bus interface uses an asynchronous transmission scheme controlled by start and stop bits at the beginning and end of each character. NMEA-2000 Pin Out The pin out for the 5-pin connector is shown in the table below. NMEA-2000 Pinouts The Mini-C [Mini-Change] connector is used on thick backbones [heavy cable]. {NMEA-2000 Index} NMEA-2000 Interface Organizations CAN Bus Interface ICs CAN Bus Interface IC Logic Transition Levels Analog Devices, Inc.

GPXSee Description GPXSee is a Qt based tool for visualizing and analyzing GPX files. Key features User-definable map sources. Track and elevation/speed graphs. Support for multiple tracks in one view. Screenshots Map sources Map (tiles) source URLs are read on program startup from the following file: $HOME/$APP_DIR/maps.txt Where $APP_DIR is GPXSee on Windows and .gpxsee on UNIX. The file format is one map entry per line, consisting of the map name and tiles URL delimited by a TAB character. Map1 Map2 POI files POI files in the GPX and "Garmin CSV"* formats are supported by GPXSee. To make GPXSee load a POI file automatically on startup, you can add the file to the following directory: * "Garmin CSV" is a simple CSV file, where the column order is: latitude, longitude, label and the delimiter is the comma (",") character. Keyboard controls Download Current version: 2.13 Developement GPXSee has a project page at Github.

Pressure Testing OpenROV Housings | UCSD Engineers For Exploration As part of our ongoing OpenROV redesign effort, we destructively pressure tested the main OpenROV pressure tube (which contains the camera, computer, and other electronics) and the battery tubes to determine at what pressure they would fail. The video below shows the main pressure tube being tested to catastrophic failure in the pressure tank at the Southwest Fisheries Science Center Acoustics Lab. Video: The OpenROV main tube imploding The pressure tubes are made of 1/8-inch thick acrylic, with endcaps made of pieces of lasercut acrylic glued together in a stack to hold the o-ring. Battery Tube Testing Results The battery tubes were placed in the tank with the epoxy-sealed end downward, and the o-ring seal at the top. The battery tubes inside the pressure testing chamber During the test, bubbling was observed from the bottom of the tube where the battery tubes were sealed with epoxy, and the tubes appeared to fill only from the bottom. External Pressure on Tube vs. Failure Analysis

Office of Naval Research Home Page GPS - NMEA sentence information Contents [ Top ] [Glenn's GPS Contents Page] 19 Interpreted sentences $GPBOD - Bearing, origin to destination $GPBWC - Bearing and distance to waypoint, great circle $GPGGA - Global Positioning System Fix Data $GPGLL - Geographic position, latitude / longitude $GPGSA - GPS DOP and active satellites $GPGSV - GPS Satellites in view $GPHDT - Heading, True $GPR00 - List of waypoints in currently active route $GPRMA - Recommended minimum specific Loran-C data $GPRMB - Recommended minimum navigation info $GPRMC - Recommended minimum specific GPS/Transit data $GPRTE - Routes $GPTRF - Transit Fix Data $GPSTN - Multiple Data ID $GPVBW - Dual Ground / Water Speed $GPVTG - Track made good and ground speed $GPWPL - Waypoint location $GPXTE - Cross-track error, Measured $GPZDA - Date & Time There is a full list of $GPxxx sentence codes available, without links to format details. [Top] Bearing Origin to Destination eg. Bearing and distance to waypoint, great circle eg1. Global Positioning System Fix Data

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