21. I am proceeding at a slackened speed. Here SLACKENED stands for __________ . (A) half (B) normal (C) reduced (D) increased

【已刪除】5. Message from RCC: helicopter will arrive in position of vessel in distress within one hour. (A) “ETA vessel in distress in one hour”. (B) “ETA distress position within one hour”. (C) “ETA distress position in one hour from now”. (D) “ETA vessel in distress within one hour from now”.