"And all I ask is a tall ship and a star to steer her by"
I have to agree with Al Placette when he said this is "one of the most beautiful and oft-quoted lines ever penned about sailing and the sea..."
If you have this extreme nostalgic feeling for this ancient art of navigation using the stars and the planets rather than a GPS, then you are not alone. At least I would be another one you can count on to share that feeling. Every time that I got to sail on a 14' dinghy or a 40' yacht, I felt that same feeling as if there was the wind of thousands years of sea going history blowing on my back. I imagined of all the courage, tragedy and triumph that people must had felt as they got lost on the high sea or able to make it to the destination.
This app is created out of a deep admiration for these ancient mariners. It is with the hope that it could help to do a little part in preserving this beautiful art of navigation, and may be, bringing us all a little bit closer to those courageous sea goers centuries before us.
Celestial Navigation Background
History of the Sextant
History of Time Keeping
Skymap Memory AidsChoose Your Weapons
The main function of this app is to help you calculate the most likely position.
|Most likely position based on two or more star sightings|
|True north is at the top of the circle.|
1. GMT time of the observations 2. Star name: SUN, MOON, Polaris, Sirius, Altair, etc. 3. Altitudes of the stars in degrees and minutes 4. Other info
|Star sight input using data from a sextant|
, then the error will average out and you will get a good fix of your position.
|Star sight input using integrated altitude measurement sensor|
Here are the main control buttons. Start to record a star sight. The same function can be activated by pressing on the volume control buttons, or the track ballcalculation will be. Show the map of all visible stars as seen from the most likely location of your phone or from a manually entered location . You can change the star map location setting using the star map menu (Starmap screen > Menu > SetLocationStarmap screen > Menu > SetTime). NO LIMB ".
|Enable Device Sensor as Sextant Input||ENABLED|
|Starmap AP (used assumed position for starmap)||DISABLED|
|Starmap CCW Azimuth||DISABLED|
|Local GMT Offset||AutoDetect|
There are a number of features available to support more advanced users. These are: 1. LOP editing:delete the LOP or edit it to account for ship movement. Menu > LOP). Modification to the LOP based on ship movement can be added via the ship movement data input dialog and Record button. One can also delete an LOP via Deletebutton.
2. Trip editing: This feature is accessible via Menu > TRIP. A user can organize all the star sight records into groupsactive trip and group to work with using the Config button. Trip and groupMenu > Edit Trip and add a trip called NewYorkToSydneygroupNewYorkToSydney, and 10 groups to hold the star sighting for this trip. Note that using trip and groupsdefaultGroup" under the trip named "defaultTrip"
3. Offline map:
In order to download the offline maps for your needs, first install the application Mobile Atlas Creator (MOBAC) on your PC. This is a freely available program available over the net ( http://mobac.sourceforge.net). The program allows you to define a map area, a map source (choose OpenStreetMap mapnik) and an atlas format (choose osmdroid ZIP ). Then you can download the map zip file and place it on your sdcard under the directory /sdcard/osmdroidunzip
|Mobile Atlas Creator|
The majorproblem .
|Diagram of sextant|
|A very nice looking modern sextant.|
|John Harrison H1 clock|
Time keeping important dates:
|3500 BC||Egyptian obelisks and sundials|
|2000 -1500 BC||Mayan calendar|
|400 BC -1600 AD||Aztec Calendar|
|1094||Sung Su's water clock perfected|
|1583||Galileo discovers pendulum period constancy|
|1656||Huygens pendulum clock|
|1736||Harrison H1 chronometer tested at sea|
|1918||quartz crystal oscillator developed|
|1944||Essen and Parry start keeping time with cesium atomic clock|
|1948-49||Lyons develops first atomic clock (ammonia)|
|1978||First GPS Block 1 satellite launched|
|1993||GPS declared operational and GPS clock available world wide|
The Big Dipper:
|Big Dipper Sky Map|
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|Orion Sky Map|
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|Southern Cross Sky Map|
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-------0-------- Please report any problems by mail to firstname.lastname@example.orgThank you for using StarStruck Navigation.