Restricted areas at locks and dams are indicated by().
- Aflashing red lights upstream and fixed red lights downstream
- Byellow unlighted buoys
- Csigns and/or flashing red lights
- Dred daymarks upstream and green daymarks downstream
Restricted areas at locks and dams are indicated by().
1、You are underway at 5 knots and see on
You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later,the contact is 8 miles directly astern of you. What is the estimated speed of the contact? ()ADead in the waterB1 knotC10 knotsD15 knot
2、You()to lock the door at night.
You()to lock the door at night.AshouldBoughtCmustDshall
3、You are underway in restricted visibil
You are underway in restricted visibility and hear a fog signal forward of the beam. Nothing appears on your radar screen. You must().Astop your enginesBsound two prolonged blasts of the whistleCsound the danger signalDslow to bare steerageway
4、There is plenty of()at this area.
There is plenty of()at this area.AA roomBRoomCRoomsDThe room
5、You()to lock the door at night.
You()to lock the door at night.AshallBoughtCmust
6、they are()with envy and jealousy at wh
they are()with envy and jealousy at what has happened to their sister.AconsumedBoverjoyedChideousDgrief-stricke