135. What is the two most important pieces of input information required to operate the ARPA?

109. What statement is TRUE when operating in fog and other vessels are detected by radar?

143. Which of the following radar presentation feature is useful in radar pilotage?

137. What is the common radar frequency ranges of bands used in coastal radar systems?

194. Identify the target that would give the best radar echo.

149. The RADAR display has sectors of solid video (spoking). What would be the first thing to check?

138. What is a radar display in which North is always at the top of the screen?

139. What is the best land target to use for a radar bearing?

104. You radar has a beam width of 2. The gyro bearing of the right tangent of an island is 316. The gyro error is 1E. Which true bearing should be plotted on the chart?

182. During navigation while ARPA running, you have the option to have two guard zones at the same time. What is the purpose of the inner guard zone?

184. What will happen to the power of radar beam as distance from the scanner increases?

122. What is the best way to monitor the risk of collision in poor visibility?

191. What ratio would be used by a typical ARPA before writing a target into the final switch register?

185. Which vector generated by ARPA has greater likelihood of errors ?

101. How long will it takes for the radar to be fully operational from the STANDBY position?

200. If the radar antenna operates at 60 RPM, how long for a typical ARPA will generate a target vector?

199. An X band RADAR operates in which frequency band?

118. What will cause the ARPA to emit a visual alarm, audible alarm, or both?

180. In fog, you observe your radar and determine that risk of collision exists with a vessel which is 2 miles of your port bow. Which action should you take?

156. What are the advantages of manually acquiring ARPA targets?

125. Which of the following ARPA data should you use in order to determine if a close quarter situation will develop with a target vessel?

107. What should you do to establish an additional radar target data other than Closest Point of Approach on a relative plot?

130. What happens to the tracking accuracy of an ARPA as the range increases?

103. What is the required frequency of radar to be fitted on a 10, 000 gross tonnage ship as per Solas V regulation 19?

114. What is the name of the movable guide line used to measure direction on a radar?

153. What is the average range of a ship's surface search radar unit?

140. What is the minimum sleeping target capacity of an ARPA?

151. An estimated point in which of the distance between two objects of which at least one is in motion will reach a minimum value?

123. In radar principle, what determines the number of pulses that strike a target?

190. What should be the size of the display on which ARPA information with alphanumerical data area around it is presented?

142. What purpose is the function "Brilliance/ Intensity/Brightness" on the radar?

162. What type of target would give the best radar echo?

159. When two ships are on reciprocal courses, what is meant by the "approaching vessel's relative speed"?

192. Your radar displayed your ship off center. As you proceed on your course, your ships marker moves on the PPI scope while echoes from land masses remain stationary. What do you call this kind of display?

168. What caused the presentation of coral atolls or a chain of islands as long line rather than as individual targets ?

110. Which of the following is the approximate time a radar pulse travel out to and the echo return from a target at 24 miles?

197. In calm and clutter-free conditions, what is the minimum detection range for S-band radar if the target is a 4-meter tall small vessel with radar reflector meeting IMO Performance Standards?

131. For all ships/crafts of 500 gross tonnage and upwards but less than 10,000 gross tonnage, what is the radar minimum operational display area in the performance requirements?

119. What is the major component of a radar system which amplifies the weak echoes received thus retaining its distinct shapes?

161. What is the main reason that you will adjust the anti-clutter SEA control during boisterous weather?

169. What is the difference between a 10-cm radar compared to a 3-cm radar?

174. By what reason that edges of land should be avoided if possible when position fixing by radar.

198. Why should you carry out an operational check when a radar set is installed?

160. What are the four elements of a Radar system?

108. What is the most accurate determination that a radar can make?

183. The speed log input to your ARPA is in error, showing your vessel's speed to be 5 knots less than the actual speed. What would you expect under these circumstances?

188. What is the minimum acquired radar target capacity in the performance requirements for all ships/crafts greater than 10,000 gross tonnage?

124. What should be recorded in the radar log?

126. The radar has display has sectors of solid video (spoking). What woud be the first thing to check?

172. Which of the following condition will happen if you turn on the fast time constant differentiator control on the radar?

181. What does a low HDOP (Horizontal Dillution of Precision) number such as 2 indicates?

157. What is the radar control that reduces weak echoes out to a limited distances from the ship?

189. What is the typical figure for minimum radar range?

127. What is the radar control used to reduce sea return at close ranges?

112. Identify the correct manual plot vector label that best represents an ARPA relative vector information?

129. Regarding the performance standards for navigational radar, what are the requirements for a scanner?

116. What is the intermediate frequency of a shipboard radar unit?

115. In what time frame an ARPA should present a steady state tracking the motion of a target with the following accuracy (95% accuracy values)?

141. Which general statement concerning radar is FALSE?

186. Which vector generated by ARPA has greater likelihood of errors?

155. When can you determine the closest point of approach (CPA) of a contact on a relative motion radar?

113. What is the ability of a radar set to clearly distinguish two targets, on the same range and slightly different bearings, as two separate targets on the PPI?

170. What facts show that an operator should carry out an operational check when a radar set is installed?

132. When using a radar in an unstabilized mode, how can you determine fixes easily?

193. Given the alteration of your own ship's course or speed required, from where can the desired Closest Point of Approach (CPA) be obtained?

165. If a target is 5 miles away, how long does it take for the radar echo to be received back at the antenna?

106. What is the name given to unwanted radial lines that sometimes appear on the radar screen?

187. Ground stabilization of the ARPA is achieved through the following EXCEPT:

117. Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?

173. If your vessel, while proceeding East at 10 knots, observed by a radar a vessel proceeding West at 10 knots, what would be the approximate direction and rate at which the pip would move on your PPI scope?

102. How much time frame should an ARPA present a steady state in tracking the motion of a target with a 95% probabilty accuracy value?

195. Which of these control is provided to check the overall efficiency of the radar?

148. Which is the MOST correct statement containing the parameters which control the size of radar target echo?

177. What is one good practice of a navigator fixing a vesel position by means of Radar?

158. Which of the following controls is provided to check overall efficiency of the radar?

120. According to Rule 19 of the COLREGs, what must be your action if you get into a close quarters situation with a vessel forward of the beam in restricted visibility?

176. When you examine the RADAR, you notice that there is no target video in the center of CRT. The blank spots gets smaller in diameter as you increase the range scale. What operatorr front panel control could be misadjusted?

150. When is the transmitted signal of the SART will be most conspicuous on the radar screen?

171. What is the minimum acquired radar target capacity in the performance requirements for all ships/crafts of less than 500 gross tonnage?

128. What is the maximum number of minutes you should wait until utilizing ARPA data for collision avoidance decision making?

175. How will a rough surface target likely to appear on the display?

167. When using the radar in heavy rain what appropriate action should you take?

166. How many Radar Transponders (SART) are required to be carried onboard a ship for use in survival crafts?

178. Which of the following do radar bearing discrimination depends mainly on?

136. Which type of radar do most ship's commonly operates?

105. What is TRUE of the history display of a target's past position on an ARPA?

121. An indirect radar echo is caused by a reflection of the main lobe of the radar beam of the observer's vessel. Which of the following is a characteristics of indirect echoes?

147. What should you do in order to ensure that the Racon signal is visible on your 3 cm radar?

179. What is the process of calculating target motion based on past positions by an ARPA?

146. What purpose has the function "Brilliance / Intensity / Brightness" on the radar?

145. Which determine the minimum range at which a target can be detected?

144. Your ARPA has been tracking a target and has generated the targets data. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?

111. What is the modulation frequency of most RADAR systems?

133. Performance standards should apply to all shipborne radar installations, used in any configuration, mandated by the 1974 SOLAS Convention, as amended by the following EXCEPT:

196. How long must an ARPA produce a relative motion display with 95% accurate CPA/TCPA?

163. You have another ship overtaking you close aboard to starboard. You have three radar targets bearing 090°, relative ranges 0.5 nm, 1 nm and 1.5 nm. In this case, what do you call the unwanted echoes?

134. What is the minimum display area diameter in the performance requirements for all ships/crafts greater than 10,000 gross tonnage?

164. Your power-driven vessel is fitted with radar and is underway in poor visibility. At what speed should you proceed?

154. Ground stabilizing of the ARPA display using auto drift (echo reference) can be problematic due to the following EXCEPT:

152. What is the purpose of the function "Änticlutter" sea on the radar?