sensor

Submarine are divided into two categories which are

• nuclear

• destroyers

• patrol submarines

• conventional

what categories of submarine are fitted with a ballistic missile, guided missile and the more common torpedo armed boat.

• nuclear

• governmental

• conventional

• political

what does SONAR stands for?

• Sound Navigation and Ranging

• Sand Navigation and Ranging

• Sound Neutraliser and Resistor

• Sound Navigation and Raging

What are the primary function of a SONAR?

• DETECT

• CLASSIFY

• DESTROY

• TRACK

• REBUILT

what other task does a sonar have? mark which one you think is correct.

• Search (passive and active)

• Noise Making

• Attack

• Navigation

• Communication

What does this explanation refers to?

"The set is employed purely and simply to listen to any noise from the surrounding oceans. due to its nature it will only produce bearing information. Passive sonars use the low frequencies below 1kHz".

• Search Passive

• Noise Making Passive

• Search Active

• Noise Making Active

What does this explanation refers to?

"the set transmits sound into the sea, if this sound wave hits a solid object as it travels away, then the sound is reflected back towards the ship. In the mean time the set will have switched from transmission to reception and will detect the echo returning. The major disadvantage is that the energy may be intercepted betraying the ship's position to the enemy. it uses the medium frequencies 2-9 kHz.

• Search Passive

• Noise Making Passive

• Search Active

• Noise Making Active

What does this explanation refers to?

"By detecting the propeller and machinery noise the target produces:

• Noise making active

• Noise making reactive

• Noise making passive

• Noise making semi-active

What Sensor equipment do we use for navigation and bottom search?

• echo sounder

• wind speed and direction

• gyro

• magnetic compass

dedicated analysis and classification equipment,

can receive an input from any of the warships sonars and provide detailed information on the target such as;

• Blade rate, shaft rate, speed

• Types of propulsion

• Bearing rate and range rate

• Type of vessel

• Non operational equipment