Sound Powered Telephone Systems

What is the most reliable means of communications onboard ship?

How many CKTs does a S/P SWBD have?

How many CKTs does a S/P switchbox have?

How many switches does a S/P switchbox have?

Which S/P headset is used in relatively quiet areas?

Which S/P headset is used in high noise areas?

What type is a S/P handset?

How many gangs do S/P jackboxes have?

What are the 3 classifications of S/P CKTs?

What S/P classification is the primary means of communication?

What S/P CKT classification are CKTs JA to JZ?

What S/P CKT classification are CKTs XJA to XJZ?

What S/P CKT duplicates certain primary CKTs?

What S/P CKT classification are CKT's X1J to X61J?

Which S/P CKT type consists of jackboxes connected in parallel to a common line?

Which S/P CKT type provides a means of rigging emergency communications between vital stations after a casualty has occured?

What type of S/P CKT is X40J?

What type of S/P CKT is used for bridge to bridge communications during underwy replenishment-at-sea?

Where is the terminal board located, which connects the receivers, transmitter, and cord within the S/P headset?

What is the purpose of C1 in a S/P headset?

What is the purpose of C2 in a S/P headset?

What is the sensitivity of the receiver and transmitter on a S/P headset?

How does a short effect a S/P CKT?

How does an open affect a S/P CKT?