Final answer:
3. Both 1 and 2 above, Both radar and sonar were the combat systems that came into full use during World War II, playing vital roles in the Allies' success. SATNAV was not in use during this era.
Step-by-step explanation:
The combat systems that came into full use during World War II are radar and sonar. These technological advancements played a critical role in the success of the Allied forces. Radar was used effectively to intercept German planes over Great Britain and in planes to detect German U-Boats on the surface of the Atlantic.
Sonar, although not explicitly mentioned in the provided reference material, was also a pivotal technology used in anti-submarine warfare during World War II. Both radar and sonar were crucial for the Allies to gain the upper hand in battles like the Battle of the Atlantic, as well as to provide advance warning of enemy attacks, contributing significantly to the outcome of the war.
During World War II, both Radar (1) and Sonar (2) came into full use as advanced combat systems. Radar, which stands for Radio Detection and Ranging, revolutionized air defense and naval operations by detecting aircraft and ships at a distance. Sonar, an acronym for Sound Navigation and Ranging, became crucial for underwater detection, enabling submarines to locate and track enemy vessels.
These technological advancements greatly enhanced situational awareness and played pivotal roles in the strategic and tactical aspects of naval warfare during World War II. Option 3, "Both 1 and 2 above," accurately reflects the widespread implementation of both radar and sonar during this period.