Another bearing question

I'm goin' down · 07-17-10, 07:09 AM

Your boat:
The bow of your boat is pointed at a relative bearing of 0 degrees. You can find its true course by tapping the equal key, and your sonarman will tell you. The bow of your boat will always be pointed at a bearing of 0 degrees, irrespective of the angle it is actually pointed. However, the boat's true course changes as the direction of the bow changes.

The target's relative bearing is its bearing relative to your boat's bow: The bow of your boat is always pointed at a bearing of 0 degrees regardless if your boat changes course. If the target is at a bearing of 90 degrees, that is 90 degrees relative to your boat's bearing of 0 degrees. If it is at a bearing of 270 degrees, that is 270 degrees relative to your boat's bearing of 0 degrees. For example, if a target is is at a bearing of 0 degrees, it is directly in front of the bow of your boat (point the periscope at 0 degrees). If you cannot see the target it is due to weather conditions or it is out of visual range. Don't confuse a target's bearing with its range from your boat. Your target could be miles away. A target at a relative bearing of 30 degrees lies at a point 30 degrees from the bearing of the bow of your boat which is pointing at a bearing of 0 degrees.

The target's bearing has no relationship to your boat's true course or the target's true course.

Target's true course. This is the direction the target is heading on the Nav Map:
0 degrees is true north, 90 degrees is true west, 180 degrees is true south and 270 degrees is true west. How about that? Just like a map that you buy at the store.

How to find true course on the Nav Map? Open the compass tool in the Nav Map. Surprise! A compass appears. The compass contains markings reflecting 0 - 360 degrees. Drag the compass on the Nav Map map making a line on the screen. The bottom of the compass intersects the line at a degree representing the true course. For example, please draw a vertical line (a perfectly vertical line) from the bottom of the map to the top of the screen with the compass tool. The bottom of the compass will intersect the line at 0 degrees. The heading is true north. If the target is heading in that precise direction, its true course is 0 degrees. If it is heading towards the bottom of the screen (i.e. heading in the exact opposite direction), drag the compass tool from the top of the screen to the bottom of the screen. The bottom of the compass will intersect the compass at 180 degrees.

In summary, A boat with a true course of 0 degrees is heading true north and one heading 180 degrees is heading true south. You can read those same numbers on the compass tool you are using as you plot its course. Regardless of the true course of your boat, its bow will always point at a bearing of 0 degrees. When you look through the periscope at 0 degrees, you should see the bow of the your boat.

That should get you started.

07-17-10, 07:09 AM	#3
I'm goin' down Ocean Warrior Join Date: Sep 2008 Location: Notify command we have entered the Grass Sea Posts: 2,822 Downloads: 813 Uploads: 0	some basics Your boat: The bow of your boat is pointed at a relative bearing of 0 degrees. You can find its true course by tapping the equal key, and your sonarman will tell you. The bow of your boat will always be pointed at a bearing of 0 degrees, irrespective of the angle it is actually pointed. However, the boat's true course changes as the direction of the bow changes. The target's relative bearing is its bearing relative to your boat's bow: The bow of your boat is always pointed at a bearing of 0 degrees regardless if your boat changes course. If the target is at a bearing of 90 degrees, that is 90 degrees relative to your boat's bearing of 0 degrees. If it is at a bearing of 270 degrees, that is 270 degrees relative to your boat's bearing of 0 degrees. For example, if a target is is at a bearing of 0 degrees, it is directly in front of the bow of your boat (point the periscope at 0 degrees). If you cannot see the target it is due to weather conditions or it is out of visual range. Don't confuse a target's bearing with its range from your boat. Your target could be miles away. A target at a relative bearing of 30 degrees lies at a point 30 degrees from the bearing of the bow of your boat which is pointing at a bearing of 0 degrees. The target's bearing has no relationship to your boat's true course or the target's true course. Target's true course. This is the direction the target is heading on the Nav Map: 0 degrees is true north, 90 degrees is true west, 180 degrees is true south and 270 degrees is true west. How about that? Just like a map that you buy at the store. How to find true course on the Nav Map? Open the compass tool in the Nav Map. Surprise! A compass appears. The compass contains markings reflecting 0 - 360 degrees. Drag the compass on the Nav Map map making a line on the screen. The bottom of the compass intersects the line at a degree representing the true course. For example, please draw a vertical line (a perfectly vertical line) from the bottom of the map to the top of the screen with the compass tool. The bottom of the compass will intersect the line at 0 degrees. The heading is true north. If the target is heading in that precise direction, its true course is 0 degrees. If it is heading towards the bottom of the screen (i.e. heading in the exact opposite direction), drag the compass tool from the top of the screen to the bottom of the screen. The bottom of the compass will intersect the compass at 180 degrees. In summary, A boat with a true course of 0 degrees is heading true north and one heading 180 degrees is heading true south. You can read those same numbers on the compass tool you are using as you plot its course. Regardless of the true course of your boat, its bow will always point at a bearing of 0 degrees. When you look through the periscope at 0 degrees, you should see the bow of the your boat. That should get you started. Last edited by I'm goin' down; 07-17-10 at 07:41 AM.