A radiotelegraph message commencing with XXX has the same meaning as a message sent by the radiotelephone commencing with().
时间:2022-09-24
The Urgency Signal()indicates that the station calling has a very urgent message to transmit concerning the safety of a ship or aircraft,or of some person on board or within sight.
时间:2022-09-19
If you wished to transmit a message by voice concerning the safety of navigation,you would preface it by the word().
时间:2022-09-16
Fog forms when the air().
时间:2022-09-15
Tripping defects in anchors frequently occur in().
时间:2022-09-11
Which radiotelephone signal indicates receipt of a distress message?()
时间:2022-09-10
To prevent a wooden hull from leaking you caulk it().
时间:2022-08-30
What is the normal length of anchor cable used to anchor a vessel?()
时间:2022-08-28