C1 - Plan and conduct a passage and determine position (300)

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問題一覧

201. Which publication requires infrequent corrections?

•Sailing Directions

202. In a paper chart, how would you find the evidence on the correction made on the chart?

•It is indicated at the left lower corner of the chart.

203. Which of the following is INCORRECT about the coarse acquisition code of Global Positioning signals?

•It is transmitted 90 degrees out of phase from the precision code.

204. In a paper chart correction, which of the following navigational aids should NOT be marked with a magenta circle?

•Aero radio beacon

205. What does a sling psychrometer measures?

•Relative humidity

206. Which of the condition given below will lead to the formation of radiation fog?

•Wind speed point: 3 knots; Cloud cover: 1/8 Ci; Temperature: 8°C; Dew: 3°C

207. How would you ensure the operational readiness of the steering system in case of emergency?

•Simple operating instructions of the steering system should be displayed in the wheel house.

208. The dry bulb thermometer is 80°F and the wet bulb temperature is 74°F, what is the relative humidity?

•70%

209. If you are in the Northern Hemisphere as a general rule (Buys Ballot's Law), how could you determine the center of low pressure?

•Faces the surface of the wind the center of low is toward your right.

210. You are running parallel to the coast and plotting running fixes using bearings of the same landmark. For the running fix, you are making more speed than you have assumed. What would be your position in relation to the coast?

•You are farther from the coast.

211. Which one is to be kept in mind when plotting a Dead Reckoned position?

•The DR position must be plotted afresh every time that there is a change in courseand/or speed.

212. What would you expect of the accuracy level of your position when navigating using DGPS?

•within a radius of 10 m

213. How would you apply an approximate height correction for aneroid barometer?

•The height in feet above sea level increased by 10% and divided by 30 gives correction in hectopascals to be added.

214. How are masses and ocean currents related to each other?

•Warm air masses warm ocean currents

215. On a significant weather chart, what information a thunderstorm symbol signifies?

•Moderate/severe turbulence and/or moderate/severe icing.

216. There are two separate carrier frequencies that carry the signal transmitted by the GPS satellite. What is the second carrier frequency?

•1227.60 MHz

217. What is shape of the North cardinal marks used in IALA Region A and Region B?

•Pillar or spar.

218. What chart would you consult to determine climatic conditions, currents or locations where ice might be encountered?

•Pilot Charts

219. Which of the following statements should you consider in planning an ocean passage?

•The direct route is not always the shortest route.

220. In determining the accuracy of your position, what will you use as a normal reference for an accurate Global Positioning System?

•World Geodetic System 1984 datum

221. How could a civilian GPS user improves accuracy level of his position?

•by using differential GPS

222. What is the TOPMARK of the East cardinal marks used in IALA Region A and Region B?

•2 black cones, one above the other, base to base.

223. How often are chart corrections published?

•Weekly

224. What is the operating principle of Echo Sounder?

•Measures the depth of the water by measuring the time for a pulse of energy to travel to the sea bed and back.

225. A common compass rose as found on a nautical chart shows true north and magnetic north. What kind of markings will you notice on the inner circle and the graduations of the circle?

•Correspondence between the thirty two points rose .

226. What is your idea about of a cold front?

•It is when a colder air is underrunning and displacing warmer air.

227. What would you conclude if you saw nimbostratus clouds develop in the close area of your ship at sea?

•There will be rain and visibilty will deteriorate.

228. What color of light will be displayed when information markers are lighted?

•White lights

229. Describe what is a COLD WALL?

•It is the sudden line of demarcation separating the Gulf Strean from the Labarador current.

230. Where can you find the data relating to the direction and velocity of rotary tidal currents?

•Tidal Current Tables

231. You are plotting a fix. The Line of Position to be run forward is an arc from the radar range. What technique can you use?

•The position of the object observed should be advanced to the new time and a new arc swung using the radius of the old arc.

232. It is known as the angular distance between the zenith and a point on the celestial sphere through the arc of the vertical circle observable for bodies above the horizon.

•Coaltitude

233. What is the color of the Starboard hand lateral marks used in IALA Region B?

•Red

234. How would you classify the type of position when a single line of position is combined with a dead-reckoning position?

•estimated position

235. What is the space formed between the direction of the earths magnetic field and the horizontal?

•Magnetic dip.

236. Which of the following publications is requiring sporadic corrections?

•Sailing Directions

237. How would you classify the position that is obtained by applying charted current and observed wind direction to your vessel's course and speed?

•Estimated position

238. In navigation, what is meant by articulated beacon?

•A buoyant structure, tethered directly to the seabed and having no watch circle.

239. What does a navigator need in pilotage?

•All the required euipment are up and running and clocks are synchronized.

240. Base on what you know, what is your opinion of dew point?

•It is the temperature to which unsaturated air must be cooled at constant pressure and constant water vapour content.

241. How does position fixing effected by satellite system?

•Simultaneous ranges from satellites.

242. You are approaching port and encountered a white buoy marked with an orange rectangle. What would it indicates?

•General information.

243. Your vessel's heading is 330° pgc and 345° psc with a 2°E gyro error. If there is a variation of 13°W, what is the deviation on this heading?

•0°

244. What will be the effect of the uncorrected deviation due to permanent magnetism if the ship is proceeding towards the magnetic equator?

•Decreases

245. What do you see on an onboard publication that is used to reckon the height of tides of a given place?

•The same tide tables as that used for the charts of the locality

246. What is meant by separation line?

•A routeing measure which ships are proceeding in opposite or nearly opposite directions.

247. What does Global Positioning System receiver measure to compute its position.

•The difference in time from signal transmission to reception

248. Base on what you know, how would you explain your understanding of relative humidity?

•It is the ratio of the existing absolute humidity to its saturation value at the same temperature.

249. Which meteorological instrument is used to measure air pressure?

•Barometer

250. How would you describe the use of wet bulb thermometer?

•It measures the temperature of the atmosphere if the atmosphere is 100% saturated.

251. If you received a weather forecasts wherein the word fracto is used as a prefix to stratus or cumulus clouds, what kind of weather is accompanying this?

•Rainy weather with strong winds.

252. Which error is being reduced by the magnets in the binnacles of magnetic compasses?

•Deviation error

253. How will you plot your vessel's position if you find that the three position line you used to plot a fixed intersect in a triangle?

•In the geometric center of the triangle.

254. What is the vertical angle between the horizontal and magnetic line of force?

•dip

255. Consider a place approaching a channel when the height of HW is 3.8 meters. The vessels draught is 2.5 meters. What is the under keel clearance over a rock of dryinhg height 0.9 meters?

•Under Keel Clearance = 0.4 meters at High Water.

256. If you are in the Southern Hemisphere as a general rule (Buy's Ballot Law), how would you determine the center of high pressure?

•Faces the surfaces of the wind the center of high pressure is in your right.

257. On a chart, which of the following navigational aids would NOT be marked with a magenta circle?

•Aero radio beacon

258. If you are in the Northern Hemisphere as a general rule (Buy's Ballot Law), how would you determine the center of high pressure?

•Faces the surfaces of the wind the center of high pressure is in your left.

259. If the ship is proceeding towards the magnetic equator, what will happen to the uncorrected deviation due to permanent magnetism?

•decreases

260. If you wish to know the general information on enroute weather and climate, in which of the following publications you will refer to?

•The Sailing Direction and Coast Pilot

261. What is the instrument onboard use to measure atmospheric pressure?

•Barometer

262. A landmark is 36.5 meters high and the light has a nominal range of 18 n.m.. Your height of eye is 12.75 meters. If the visibility is 11.2 n.m. when the light becomes visible, approximately how far off the light you will be?

•19.0 nm

263. Which one is part of the compass wherein the graduated directions are placed?

•Compass Card

264. How should you consider the best meteorological factors in planning an ocean passage?

•A choice of route that must be balanced between consideration of safety and time.

265. What do you think is one of the most applicable method in connection with the keeping up-to-date Sailing Directions by navigators?

•To know incidently if the book will be the subject of revision within a short time.

266. In navigation, what is meant by a bell?

•A sound signal producing tones by means of a hammer actuated by electricity.

267. What is the light color (when fitted) of the WEST cardinal marks used in IALA Region A and Region B?

•White

268. What is meant by FIX in navigation?

•It is a vessel position at time of observation.

269. What is the bearing of the celestial body during meridian transit at the First Point of Capricorn if the observer is at the equator?

•180 degrees

270. Where will you find the correction to apply to your barometer reading in order to allow for the effect of diurnal variation?

•The amount of which is given each hour of the day in the customary climatic atlases.

271. If mis-alignment of the radar heading marker exists, how would you correct at first opportunity?

•Ensure that the heading marker line on the display is aligned with the fore-and-aft line of the ship

272. What is a barometer?

•An instrument for measuring atmospheric pressure

273. Which magnetic corrector(s) CANNOT be set while the vessel is on a heading of magnetic north or magnetic south?

•Flinder's bar

274. How can it help you to avoid the center of the storm using your radar?

•The Radar can display on the screen areas moderate or heavy rain continuously for at least 50 nautical miles in broad sector.

275. What is meant by acronym EBL?

•Electronic Bearing LIne

276. What features(s) of a daymark is (are) used to identify the beacon upon which is mounted?

•Color and shape

277. Which of the following statements best describe the term tide?

•Regular vertical movement of the sea level in oceans

278. What can you determine in the readings of dry and wet thermometer on a psychrometer?

•Relative humidity and dew point

279. Referring to the Light List, a light has a nominal range of 14 miles and 12.8 meters high. If the visibility is 6 nautical miles and your height of eye is 6.0 meters, at what approximate distance will you sight the light?

•10.0 nautical miles

280. What is meant by the Speed of Advance?

•This is the intended speed with respect to the earth, taking into consideration the effect of known predicted current.

281. Which of the following occuring phenomena can change the polarity of the magnetic properties of a vessel?

•Being struct by lightning.

282. What is the topmark (if any) of the Starboard hand lateral marks used in IALA Region A?

•Single green cone, point upward

283. What is the top mark (if any) of the Starboard hand lateral marks used in IALA Region B?

•Single red cone, point upward

284. How would you compare the precision of the vessel's position during a coastal passage?

•It is an accurate position fix taken from conspicuous landmarks.

285. Which of the following statements DO NOT describes a Cold Front?

•The warmer air ascends over the colder air is more less uniform where the intensity of rain fall is is widder and longer in duration.

286. What would be the required movement of a rudder in a typical cargo ship?

•35 degrees port and starboard.

287. What meteorological conditions are likely to produce sub-refraction?

•Very cold air blowing over a relatively warm sea.

288. A common compass rose as found on a nautical chart shows true north and magnetic north. How many traditional winds are listed on a modern compass rose?

•Eight

289. Consider a place approaching a channel when the height of HW is 2.8 meters. The vessels draught is 1.5 meters. What is the under keel clearance over a rock of drying height 0.9 meter?

•UKC = 0.4 meters at HW

290. At 1045H, your GPS fixes your position at Lat 21° 01.75' N and Long 172° 48.40' W. You are steering a course of 086° psc at a speed of 6.0 knots. At 2400H, you fix your position at Lat 21° 04.2' N and Long 172° 38.85' W. What were your set and drift?

•360°T x 0.4 knots

291. Which statement is CORRECT regarding thunderstorms?

•During the mature stage of a thunderstorm cell: the cloud contains upcurrents and downcurrents.

292. What is the shape of the buoy for the Starboard hand lateral marks in IALA Region A?

•Conical, pillar or spar.

293. Which one best describes Gulf Stream?

•An ocean current which originates in the Gulf of Mexico and causes warm water to travel up the east coast of United States.

294. What is the effect of an uncorrected deviation due to permanent magnetism when a ship is proceeding towards the magnetic equator?

•Decreases

295. How are air masses and ocean currents connected to each other?

•Warm air masses warm ocean currents

296. How can you predict the velocity of of the current in large coastal harbors?

•It is predicted in Tidal Current Tables

297. Which is the basic operating principle of the satellite navigation system?

•Doppler shift

298. When the body is on the rational horizon, what is its zenith distance?

•090 degrees

299. What do you expect of your position to be 95% accurate when navigating using GPS?

•within radius of 100 m

100

300. How can you identify aids to navigation marking the intracoastal waterway?

•By yellow stripes, squares or triangles marked on them.

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