{"id":17722,"date":"2018-04-05T16:51:59","date_gmt":"2018-04-05T14:51:59","guid":{"rendered":"https:\/\/www.adrena-software.com\/?p=17722"},"modified":"2019-01-23T16:54:10","modified_gmt":"2019-01-23T15:54:10","slug":"function-how-to-calibrate-on-board-instruments","status":"publish","type":"post","link":"https:\/\/www.adrena-software.com\/en\/function-how-to-calibrate-on-board-instruments\/","title":{"rendered":"Function : How to calibrate on-board instruments"},"content":{"rendered":"

If you want to make the most of Adrena<\/a> and Octopus<\/a> software and analyse your boat performances, you need to make sure your instruments are properly calibrated.<\/p>\n

Adrena\u2019s calibration tools analyse data collected by the navigation system sensors and inform you of the errors.<\/p>\n

Windvane calibration<\/h3>\n

The principle of this alignment consists in sailing a run <\/em>on the starboard tack and then, on the port tack. The program measures the upwind angle on each tack, filter them to calculate and apply an offset.<\/p>\n

You can also start with the port run<\/em> if you prefer. You can also do several successive runs <\/em>on each tack to sharpen calculations.\u00a0 It is not necessary to proceed to the same number of runs on each tack, and they can have different duration.\u00a0 Carefully adjust the boat settings, in exactly the same way, on both tacks.<\/p>\n

It is advised to proceed with calibration during calm seas and constant wind. Effectively, even if the program averages the wind variation, the helmsman’s reactions to the wind changes are usually different on the port or starboard tacks. This could result in an asymmetric effect from one tack to another, which could affect the calibration.<\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n

Launch the ” Calibration\u2192 Windvane calibration”menu.<\/p>\n

\"\"<\/a><\/p>\n

Position the boat upwind on its starboard\u00a0 tack then click on “Starboard Run”. Let the boat collect a certain amount of data (15 to 30s) then click on “Stop Starboard Run”. Then, tack an stabilise the boat upwind and proceed the same way on the Port Run.<\/p>\n

The program directly indicates the correction to make in your navigation system (no need to divide by two).<\/p>\n

Caution: If a calibration value already exists in your navigation system, the correction to make must be added or subtracted to the existing calibration value.<\/p>\n

To avoid these mistakes, it could be wise to reset the windvane calibration to 0, before doing the calibration runs.<\/p>\n

 <\/p>\n

Calibration of the speedometre\u00a0and compass<\/strong><\/p>\n

The Speedometer can be very easily calibrated with the software. This is accomplished by doing between one and tree runs (from \u00bd to 1 mile), under engine and in the axis of the current.<\/p>\n

As the program does these calculations based on average speed and not distance, the distances covered during the different runs, <\/em>do not need to be identical.<\/p>\n

It is advised to proceed with calibration in calm sea conditions and while avoiding strong crosswinds. Head wind has no incidence on the calculations.<\/p>\n

Only do one run<\/em> if you consider that there is no current; do two runs, <\/em>\u00a0if you want to take into account the current, and if you consider that it will not evolve between these two runs; finally, do three runs if you want to take into account the current variations.<\/p>\n

It is not necessary to have any fixed marks (buoys as marks) the program is set on the GPS position.<\/p>\n

The compass alignment is done in exactly the same way during the same run(s)<\/em> . Do not forget to adjust it before, if you think that it might be subject to magnetic influence. Most navigation systems enable it to be done, either automatically, or after several boat rotations on the spot. The value of the magnetic variation, necessary for the calculation, is automatically calculated, whatever your navigation area in the world is.<\/p>\n

 <\/p>\n

Launch the “Calibration\u2192 Speedo and compass” <\/em>menu.<\/p>\n

\"\"<\/a><\/p>\n

 <\/p>\n

Speed up the boat with the engine (the higher the speed is, the less influence the current has) facing or with the current aft, if there is any, click on “run1”. After covering about \u00bd mile, click on “end run1”.\u00a0 The first run is over and the program informs you of the corrections to apply to the speedometer calibration and the compass alignment. If you consider that there is no significant current (less than 0.1 knots), the calibration is completed; otherwise, proceed with the 2nd <\/sup>run<\/em>:<\/p>\n

Do a U-turn, click on 2nd <\/sup>run<\/em> and follow the same course covered in run1 in the opposite direction. Then, click on “end run2”.\u00a0 The program informs you of the correction to apply, taking the current into account this time. The displayed correction is the multiplier coefficient to apply to the calibration value, already in the navigation system. Example: if the calibration in the navigation system is 110 and the correction coefficient given by Adrena is 1.2, the calibration value to enter in the navigation system is 110 x 1.2 = 132.<\/p>\n

If you consider that the current has not changed between the two runs <\/em>(less than 0.1knots variation), the calibration is completed; otherwise, proceed with the 3rd<\/sup> run<\/em>:<\/p>\n

 <\/p>\n

Do a U-turn, click on “run3” and follow the same course covered in run1.\u00a0 Then, click on “end run3”. The program informs you of the correction to apply, taking the current variations into account this time. The calibration is completed.<\/p>\n

You can now transfer these values into your navigation system.<\/p>\n

\"\"<\/a>\"\"<\/a><\/p>\n

Caution: If calibration is already in the navigation system, the correction must be applied to the preset calibration.<\/p>\n

To avoid errors, it is advised to set the speedometer calibration to the average value before proceeding with the calibration runs.<\/p>\n

Using Adrena calibration tools will help you to avoid errors when calculating polars or exploiting the laylines.<\/p>\n

More technical questions ? Consult our FAQ<\/a> page<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

If you want to make the most of Adrena and Octopus software and analyse your boat performances, you need to make sure your instruments are properly calibrated. Adrena\u2019s calibration tools analyse data collected by the navigation system sensors and inform you of the errors. Windvane calibration The principle of this alignment consists in sailing a […]<\/p>\n","protected":false},"author":688,"featured_media":17713,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1500,1507],"tags":[],"class_list":["post-17722","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical","category-tutorials"],"acf":[],"yoast_head":"\nFunction : How to calibrate on-board instruments - Adrena software<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.adrena-software.com\/en\/function-how-to-calibrate-on-board-instruments\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Function : How to calibrate on-board instruments - Adrena software\" \/>\n<meta property=\"og:description\" content=\"If you want to make the most of Adrena and Octopus software and analyse your boat performances, you need to make sure your instruments are properly calibrated. 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