What would cause an FBB antenna to lose...

🔍 Key Concepts

• Stabilized satellite antennas must continuously track a moving point in the sky as the ship rolls and pitches • The role of internal motion sensors (pitch/roll/heading sensors) in keeping the antenna pointed at the satellite • Difference between a system status indication and the actual mechanical/pointing limitation of the antenna

💭 Think About

• Which condition would most directly prevent the antenna from accurately following the satellite as the vessel moves, regardless of transmit power? • How would loss of pitch/roll information affect the antenna’s ability to maintain direction compared to simply seeing a high elevation angle? • What does it mean when an antenna reaches its maximum travel in one direction – can it still follow the satellite if the vessel’s motion continues beyond that limit?

✅ Before You Answer

• Identify which option describes a problem with antenna stabilization/control, not radio power level or normal geometry • Consider which indication suggests the antenna cannot move or track any farther in the required direction • Verify which condition would cause intermittent or lost lock even though other system parameters might appear normal

What would cause an FBB antenna to lose constant lock on the satellite?

An indication on a meter or on the display terminal of lowered transmit power.

Loss of the internal antenna pitch / roll sensors (IMS).

An indication of a very high antenna elevation on the display terminal screen.

An indication that the antenna has reached its maximum travel in one direction.

🔍 Key Concepts

💭 Think About

✅ Before You Answer