Deck : Rules of the Road - 1575/1025
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| « Previous Question |
| BOTH INTERNATIONAL & INLAND You are heading due east (090°) and observe a vessel's red sidelight on your port beam. Which direction may the vessel be heading? |
| A) southeast (135°) |
| B) northeast (045°) |
| C) southwest (225°) |
| D) northwest (315°) |
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| Comments |
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| Easton - 2022-06-01 05:02:33 Registered (6662) |
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| Easton - 2022-06-01 04:55:10 Registered (6662) |
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| jackfischetti - 2021-03-10 15:14:21 Member (1) |
| I think the key phrase is PORT BEAM. If it were port bow I think it could be either NW or SW, but since it is BEAM, if you draw it out it is clearly SW. |
| Deep Space - 2021-03-01 19:56:41 Member (11) |
| 270 may not be the key. What is key is that when you look abeam to port you are sighting 360 (assuming you are 90 eastbound). From that aspect you would only seen a stern light of a vessel pointed 315 (135 arc of the stern light) ... That leaves only C, SW 225 as the best answer. |
| RickC137 - 2020-06-12 14:33:37 Expired Member (3) |
| The reciprocal of your course is 270. If the other vessel is on your beam on course 315, that is a 45 degree difference. The sideight would only show 22.5 aft of the beam. Anything more than 22.5 degree difference and your looking at a stern light. Only way to see both sidelights would be if the orher vessel was on course 180. |
| JeffR - 2019-06-23 12:04:38 Member (1) |
| SW (225 deg) is the correct answer. I draw pictures on a maneuvering board to help. But you can think of it this way: If you are meeting another vessel in a red to red, or port to port meeting situation, the other vessel is going in an almost opposite direction. In this case the other vessel would be travelling on a course as close to 270 deg as the answer allows. If the other vessel was travelling NW you would not see red light, only a stern light. Draw it out and remember your Arc of Visibilities. I hope this helps. |
| Rad1687 - 2019-04-23 10:55:14 Member (3) |
| So which is the correct answer? NW or SW? |
| Patrickg - 2019-04-02 08:25:37 Member (2) |
| It should be northwest. If it was southwest you would observe both sidelights. |
| gibbo8489 - 2019-03-26 08:55:20 Member (2) |
| This is terrible. Why is it not NW? |
| ncalcamu - 2016-01-04 17:59:04 Member (5) |
| no comments |
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