DE428223C - Course determination device - Google Patents

Description

Course determination device. Purpose of the invention.

The device to determine the course should be used at night To clarify and / or clarify the application of the rules of avoidance between sailing ships. to facilitate and thus prevent collisions.

A. Essence and basic idea. Device with 2-line division (see , = 1bb. i) .- a) The disk is - similar to the grain pass - divided into 16 equal sectors. In practice, this 2-line division is completely sufficient and clearer. (Of course, nothing stands in the way, for special purposes the i-dash division of the Imitating compasses.) Only in the division of lines is there similarity to the Compass; there is no designation of the cardinal points.

b) Wind line.

A single radius is drawn particularly strongly and with a Arrow - wind direction (LI ') provided. It's the wind streak. From him they count Radii on both sides from o to r6 dash.

c) central circle.

A circle around (read "the center of the disk is (read area of the observation ship. It has its position in one of its sectors - the stern in the center, the bow behind the periphery directed (fixed pointer E) -.

d) Peripheral circles.

On the periphery of the disc there are 16 smaller ones - one below the other colored circles of equal size, the centers of which are each on one of the 16 large radii of the Disc lie. These r6 smaller peripheral circles are in turn in turn 16 sectors divided. The diameters of all 17 circles (including the larger inner circle) form a system of parallel lines. Is clearly visible this without further ado with your wind line S, which is more strongly indicated in all circles is. In this way 8 systems of 9 parallel lines arise. e) meaning of the colors. r. Black sectors. All 17 circles show a black zone of 4th cohesive sectors - 8 lines. Everywhere the mean radius is the Windstroke.

The black zone means the impassability for sailing ships according to the prerequisite, according to which modern v sailing ships on average on both sides .4 Be able to drive on the winch.

2. Green sectors. These denote the area on which the sighted Ship (it is in the center of the peripheral circles) can and must go alone, if it shows the green light.

3. Red sectors. Likewise for red sighted light.

4. Red-green dots on either side of the main radii indicate that the sighted ship is heading straight for the observer. (Seemingly paradoxical the green dots in front of the red, the red dots in front of the green sectors. One a brief reflection immediately reveals the correctness of this representation. Strictly speaking the points should only be on the radii themselves. That is with the small dimensions the disc cannot be displayed. But even then, the points would still be opposite the colors of the sectors. It is clear that the sighted ship at the slightest Change of course immediately shows the one-sided correct light in the correct sector.) the The number of colored sectors in the circles is different, it varies from i to 5, d. 1i. between 2 and 10 lines. This fluctuation results from the impassable S-dash zone.

Two peripheral circles, which correspond completely, show a special case -Show red (or green) light on both sides of the black zone. The sighted The ship can therefore sail with both starboard and port jibs. This ambiguity cannot be eliminated even with calculations with mathematics and compass and is icy only that the position sail disc exactly follows the scientific calculations - this circle is a warning signal -. B. Practical use of the disc. a) Unmounted. You either hold the disc in your hand - or rather - put it flat on the middle of the cabin roof. Now the arrow is pointing in the direction of the wind brought parallel to this. The disk thus has its required position. Now the eye bores up over the center of the disk to the sighted ship. The one here The colored circle hit is the one you are looking for. With ease is out of its colors to recognize the meaning of the sighted light. b) Assembled (see Fig. 2 and 3) The disc has a pointer E in the center circle (when praying in the shape of a ship with green and red). The pointer is firmly connected to a floor board by an axis the sail disc itself is rotatable about this axis.

A second pointer-like alignment strip Z is the radius from the center the disc to its edge. He wears where he is above the centers of the peripheral Circles, a second rotatable pointer IL (small shuttle).

The setting is then carried out as follows: The center pointer E (observer ship) is brought into the center line of your own ship (i.e. the course) (if the disc is not already fixed once and for all). Finally, the disc is rotated until the wind line ff 'is parallel to the existing winch and on the same side. Finally, the long direction pointer Z is placed in the direction of the sighted light. On the colored circle found in this way, the second small boat pointer K can finally be set to the corresponding color and shows the course of the sighted sailing ship.

If the bearing does not hit a peripheral circle centrally (2-line division), the closest circle is of course selected. Falls the Bearing exactly between 2 color circles, you either decide according to your choice for one of the two or leaves the pointer on the middle and icc: i: <trues the middle position very easily by smearing or adding half a sector - i line red or green. C. Practical example (mounted disc) (see Fig.2). The observer is heading north with a westerly wind and sees a red light in 1T0.

The disc becomes horizontal at any point on your own ship placed in such a way that the center pointer E (own ship) is in the course (i.e. in the present Fall also to N). Now you turn the movable disc until the Wind line N 'also comes from W (i.e. dwars). Last will be the big pointer Z in the direction of the sighted ship. (NO) brought. The one hit here Circle shows a sector in red, on which the sighted ship (on the winch or close on the winch). By setting the second small line. like K on this red sector, the picture can be made completely true to life.

You can see that the two ships can only approach each other slowly. To The observer has to avoid the existing rules of evasion (clear wind, Ltiveite).

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Claims (1)

PATRNT CLAIM: Display device for the course of a sailing ship Another sailing ship sighted at night, characterized in that on one A central circle, an arrow indicating the direction of the wind, divided into lines like a compass (TV) and peripheral circles are plotted that define the field of view of the position lights on the individual lines in color, so that, depending on the setting (depending., large Pointer (Z) in the right direction of the sighted light, the small one attached to it Pointer (h), with the point on the one of the same color with the sighted position light Field directed, indicates the course of the ship.