Question 42Electricity/Electronics - 1st Asst/Chief70% to pass
As shown in the illustrated echo sounding display unit and control panel and pertinent operating characteristic tables, what situation would require increasing the unit gain? Illustration EL-0186
AI Explanation
The correct answer is A) transitioning from a stone/rock seabed to a sand seabed.
When transitioning from a hard, rocky seabed to a softer, sandy seabed, the echo sounder will receive weaker returns from the seafloor. To compensate for this, the operator would need to increase the unit gain to amplify the weaker signals and provide a clearer display.
The other answer choices describe transitions where the seafloor material either stays the same (C and D) or becomes softer (B), which would not require an increase in gain to maintain a clear echo sounder display.
Related Questions
#40 As shown in the illustrated adaptive digital steering control system functional block diagram and listed system interface signals table, what would the rudder order signal output voltage to the rudder servo amplifier be for a rudder order of 20 degrees left rudder, assuming left rudder signals are negative and right order signals are positive in polarity? Illustration EL-0191 #41 As shown in the illustrated adaptive digital steering control system functional block diagram and listed system interface signals table, what would the rudder order signal output voltage to the rudder servo amplifier be for a rudder order of 15 degrees right rudder, assuming left rudder signals are negative and right order signals are positive in polarity? Illustration EL-0191 #43 Using the trouble analysis chart and faults table provided in the illustrations, if the adaptive digital steering system was malfunctioning, and the fault code 41 (SPEED LOG ERROR) is displayed, what corrective action should be performed LAST? Illustration EL-0197 and EL-0198 #44 Using the trouble analysis chart and faults table provided in the illustrations, if the adaptive digital steering system was malfunctioning, and the fault code 42 (SPEED LOG ERROR) is displayed, what corrective action should be performed FIRST? Illustration EL-0197 and EL-0198 #45 Using the trouble analysis chart and faults table provided in the illustration, if the gyrocompass was malfunctioning, but no fault codes are present on the display unit, what is most likely the problem if the DC/DC converter LED status indicator is functioning properly, but the CPU LED status indicator is not blinking? Illustration EL-0195