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| + | [[File:Galaxy helm station.jpg|thumb|The heading is programmed in at the helm control station]] |
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| − | '''Heading''' is an expression of the direction a [[spaceship|space vessel]] is to travel in. It is composed of two numbers: an azimuth (horizontal) value and an elevation (vertical) value, separated by the designator "mark". Each number ranged between zero and three hundred sixty degrees. ({{TNG|Datalore}}) |
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| + | [[File:Astrogator.jpg|thumb|Heading could also be changed by manipulating the dial on the ship's [[astrogator]]]] |
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| + | A '''heading''' was a common way to describe the direction of travel of a [[starship]]. Headings were programmed in at the ship's [[helm]] control using a combination of two 360-degree directions on planes that are at a right angles to one another, separated by the word "mark". ({{TNG|Datalore}}) |
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| + | The terms heading and '''course''' were often used as synonyms. ({{TNG|Brothers}}; {{TOS|The Deadly Years}}, etc.) Starships traveling at [[Warp factor|warp speeds]] usually traveled in a straight line to the destination [[coordinates]]. ({{VOY|Drive}}) While sometimes, a course could also be a more elaborate flight path, that included changes in heading and parabolic trajectories. ({{VOY|Alice}}; {{film|2}}) |
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| − | '''Heading''' differs from '''[[bearing]]''' in that '''heading''' describes the direction of travel, whereas '''bearing''' refers to the position of an object relative to the position of the vessel taking the bearing. |
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| + | A more precise measuring angle system, beyond the 360-degree system, was sometimes used with headings such as 903-mark-6. ({{TOS|Day of the Dove}}; {{TAS|The Practical Joker}}; {{VOY|Workforce}}) |
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| − | In [[2355]], [[Captain]] [[Jean-Luc Picard]] of the [[USS Stargazer]] ordered a sensor ''bearing'' of a hostile (later identified as [[Ferengi]]) ship), and was advised the bearing was seven-mark-nineteen (7-19), putting the vessel slightly above and to starboard of the ''Stargazer''. He then ordered his helmsman to engage warp nine on a ''heading'' of seven-seven-mark-twenty (77-20), traveling further starboard, and up on the vertical plane. ({{TNG|The Battle}}) |
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| + | == Examples of headings == |
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| − | Some headings (or bearings) can be expressed using one of two different measurements. Turning completely around (or an object directly behind) could be expressed either as one-eight-zero-mark-zero (180-0) or zero-mark-one-eight-zero (0-180). |
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| + | * Heading from the [[Bajoran system]] to the [[Klingon Empire]] was 327-mark-215. ({{DS9|Sons of Mogh}}) |
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| − | {{stub}} |
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| + | * Heading from [[Deep Space 9]] to the [[Cardassian Empire]] was 269-mark-032. ({{DS9|The Way of the Warrior}}) |
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| + | * Heading from the [[Federation-Tzenkethi border]] to the [[Tzenkethi]] planet [[M'kemas III]] was 015-mark-47 ({{DS9|The Adversary}}) |
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| + | * Heading from the [[Romulan Neutral Zone]] to [[Vulcan]] was 143-mark-012. ({{TNG|Unification II}}) |
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| + | * Heading from [[Starbase 234]] to the [[Klingon-Romulan border]] was 118-mark-357. ({{TNG|Redemption II}}) |
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| + | * Heading from [[Starbase 375]] to the [[Cardassian border]] was 054-mark-093. ({{DS9|A Time to Stand}}) |
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| + | * Heading from [[Tarsas III]] to [[Bynaus]] was 233-mark-45. ({{TNG|11001001}}) |
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| + | * Heading from the [[Vulcan system]] to the [[Laurentian system]] was 151-mark-3. ({{film|11}}) |
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| + | * Heading from [[Ivor Prime]] to [[Earth]] was 0-mark-215. ({{film|8}}) |
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| + | * In [[2371]], {{USS|Voyager}} was holding a course 351-mark-10 on it's voyage back to Earth from the [[Delta Quadrant]]. ({{VOY|Time and Again}}) |
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| + | * In the more precise measuring angle system, heading from the [[Klingon-Federation border]] away from the [[Milky Way Galaxy]] was 902-mark-5. ({{TOS|Day of the Dove}}) |
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| + | == Appendices == |
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| + | === See also === |
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| + | * [[Bearing]] |
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| + | * [[Coordinates]] |
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| + | * [[Borg spatial designations|Grid]] |
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| + | * [[Navigation]] |
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| + | * [[Quadrant]] |
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| + | * [[Sector]] |
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| + | === Background information === |
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| + | The first use of headings in degrees occurred in ''[[Star Trek: The Original Series]]'' episode {{e|Balance of Terror}}. The meaning of headings as two 360-degree angles was established in "Datalore". The system of degrees was further explained in [[reference books]], such as ''[[Star Trek: The Next Generation Technical Manual]]'' (pgs. 36, 37). |
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| + | The first 360-degree figure is a direction in an imaginary plane similar to the [[galactic plane]], but between the ship and the [[Galactic core|center]] of the [[Milky Way Galaxy|galaxy]]. What ever the location of the ship in the galaxy is, heading 000-mark-0 is always a direct course to the center of the galaxy. Heading 180-mark-0 is a direct heading away from it. A heading from [[Earth]] directly to the [[Beta Quadrant]] would be 090-mark-0 and further into the [[Alpha Quadrant]] 270-mark-0. |
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| + | As explained in "Datalore", the second 360-degree figure is the elevation angle at a right angle to the previous plane. A heading of 000-mark-90 would be a heading directly upwards away from the plane, where as 000-mark-270 a heading directly downwards. |
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| + | === External link === |
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| + | * {{wikipedia|Course (navigation)}} |
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[[de:Kurs]] |
[[de:Kurs]] |
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| + | [[Category:Cartography]] |
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Revision as of 00:12, 1 May 2014
The heading is programmed in at the helm control station
Heading could also be changed by manipulating the dial on the ship's astrogator
A heading was a common way to describe the direction of travel of a starship. Headings were programmed in at the ship's helm control using a combination of two 360-degree directions on planes that are at a right angles to one another, separated by the word "mark". (TNG: "Datalore")
The terms heading and course were often used as synonyms. (TNG: "Brothers"; TOS: "The Deadly Years", etc.) Starships traveling at warp speeds usually traveled in a straight line to the destination coordinates. (VOY: "Drive") While sometimes, a course could also be a more elaborate flight path, that included changes in heading and parabolic trajectories. (VOY: "Alice"; Star Trek II: The Wrath of Khan)
A more precise measuring angle system, beyond the 360-degree system, was sometimes used with headings such as 903-mark-6. (TOS: "Day of the Dove"; TAS: "The Practical Joker"; VOY: "Workforce")
Examples of headings
- Heading from the Bajoran system to the Klingon Empire was 327-mark-215. (DS9: "Sons of Mogh")
- Heading from Deep Space 9 to the Cardassian Empire was 269-mark-032. (DS9: "The Way of the Warrior")
- Heading from the Federation-Tzenkethi border to the Tzenkethi planet M'kemas III was 015-mark-47 (DS9: "The Adversary")
- Heading from the Romulan Neutral Zone to Vulcan was 143-mark-012. (TNG: "Unification II")
- Heading from Starbase 234 to the Klingon-Romulan border was 118-mark-357. (TNG: "Redemption II")
- Heading from Starbase 375 to the Cardassian border was 054-mark-093. (DS9: "A Time to Stand")
- Heading from Tarsas III to Bynaus was 233-mark-45. (TNG: "11001001")
- Heading from the Vulcan system to the Laurentian system was 151-mark-3. (Star Trek)
- Heading from Ivor Prime to Earth was 0-mark-215. (Star Trek: First Contact)
- In 2371, USS Voyager was holding a course 351-mark-10 on it's voyage back to Earth from the Delta Quadrant. (VOY: "Time and Again")
- In the more precise measuring angle system, heading from the Klingon-Federation border away from the Milky Way Galaxy was 902-mark-5. (TOS: "Day of the Dove")
Appendices
See also
Background information
The first use of headings in degrees occurred in Star Trek: The Original Series episode "Balance of Terror". The meaning of headings as two 360-degree angles was established in "Datalore". The system of degrees was further explained in reference books, such as Star Trek: The Next Generation Technical Manual (pgs. 36, 37).
The first 360-degree figure is a direction in an imaginary plane similar to the galactic plane, but between the ship and the center of the galaxy. What ever the location of the ship in the galaxy is, heading 000-mark-0 is always a direct course to the center of the galaxy. Heading 180-mark-0 is a direct heading away from it. A heading from Earth directly to the Beta Quadrant would be 090-mark-0 and further into the Alpha Quadrant 270-mark-0.
As explained in "Datalore", the second 360-degree figure is the elevation angle at a right angle to the previous plane. A heading of 000-mark-90 would be a heading directly upwards away from the plane, where as 000-mark-270 a heading directly downwards.