29. 翻譯：對地速率是15節。 (A) Speed over ground is 15 knots. (B) Speed made good is 15 knots. (C) Speed over seabed is 15 knots. (D) Speed of bottom is 15 knots.

4. What sound signals should a vessel engaged in fishing, sound in reduced visibility? (A) One prolonged followed by two short blasts at intervals of not more than 2 minutes. (B) One prolonged blast at intervals of not more than 2 minutes. (C) Two prolonged blasts at intervals of not more than 2 minutes. (D) Four short blasts at intervals of not more than 2 minutes.

29. 翻譯：對地速率是15節。
(A) Speed over ground is 15 knots.
(B) Speed made good is 15 knots.
(C) Speed over seabed is 15 knots.
(D) Speed of bottom is 15 knots.

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