Ocean7212-2

兩側相差多少 dB時，為beamwidth定義？ What is the dB difference used to define the beamwidth on either side?

• 1 μPa

• 3 μPa

• 3 dB

• 2 dB

當音鼓角度越大時，下列何者為優點? What is the advantage of an increased beamwidth angle?

• 可以鎖定目標物Find the target easily

• 風浪很差時，崎嶇的地形 Rough terrain in poor wind and wave conditions

• 可以擁有很大的陰影帶 a large shadow zone

• 風浪很差時，平坦的海床 Flat seabed in poor wind and wave conditions

下列何者"不是" Split Beam 的優點? Which of the following is not an advantage of Split Beam?

• 回波強度分析 Echo Intensity Analysis

• 很便宜 Very inexpensive

• 精確定位 Accurate positioning

• 運動追蹤 Motion tracking

Which of the following is true about Continuous Wave (CW) and Frequency Modulation (FM)?

• CW signals have a constant frequency

• CW and FM signals exhibit frequency variation but in different manners.

• CW signals are characterized by varying frequencies

• CW signals are used for high-frequency, while FM signals are low-frequency

下周9月19的課程幾點開始?

• 12:20

• 13:20

• 14:10

• 15:10

一隻大魚在EK影像中的樣子為何?

在100公尺水深的50公尺處
往左邊游~