47. Which of the following emergency signals are used to report for boat stations or boat drills?

Three short blasts of the whistle along with the same signal on the general alarm bells.
More than six short blasts and one long blast of the whistle, along with the same signal on the general alarm bells.
Steady rapid ringing of the ship's bell for at least 10 seconds, along with the same signal on the general alarm bells.
Less than five short blasts and one long blast of the whistle, along with the same signal on the general alarm bells.

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