You are taking a time tick using the 1930 signal from Rio de Janeiro, Brazil. You hear the preparatory signal "CQ DE PPE" repeated several times followed by a short dash (0.4 sec), 60 dots (0.1 sec each) and another short dash. At the beginning of the last dash, the comparing watch reads 07h 30m 08s. When compared to the chronometer, the comparing watch reads 07h 31m 48s, and the chronometer reads 07h 32m 16s. What is the chronometer error?
⢠Radio time signals and which element marks the exact time (beginning of which signal segment)** ⢠How to relate the comparing watch to the chronometer (which one is ahead/behind and by how much) ⢠How to find chronometer error by comparing chronometer time to the true time of the signal
⢠Identify precisely at what instant the exact 1930 time is defined during the signal (which dash or dot, and at the beginning or end?). ⢠Work step-by-step: first find the true time of the comparing watch at the signal, then find what the chronometer should have read at that same instant. ⢠From the difference between the chronometerâs indicated time and the true time, decide whether the chronometer is fast or slow, and by how many seconds.
⢠Be sure which watch reading corresponds to the exact time mark from the signal. ⢠Carefully determine whether the comparing watch is fast or slow relative to the chronometer (direction matters). ⢠After you compute the chronometerâs true time, doubleâcheck if you state the error as fast/slow correctly based on whether it is ahead of or behind true time.
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