Final answer:
Without specific coordinates or reference points, it's not possible to determine the exact direction or distance from the Jack Up Rig to the Anchored SemiSub Rig. Typically, an environmental engineer would use sonar or similar technology to navigate the underwater robot.
Step-by-step explanation:
The question does not provide enough information to give a precise direction and distance that the environmental engineer should direct the underwater robot to inspect the ocean floor around various oil rigs. Since these rigs can be located at various points and distances relative to each other, and the starting position is unknown, one cannot determine the exact distance and direction from the Jack Up Rig to the Anchored SemiSub Rig without additional data.
However, in a general scenario, an environmental engineer would potentially use similar methods as described in the example of an underwater robot or sonar technology. For instance, referring to the provided examples, if a sonar echo returns to a submarine after 1.20 seconds and sound travels at 1450 m/s in sea water, the distance to the object creating the echo can be calculated as speed of sound × time ÷ 2 (since the signal has to travel to the object and back). Using the provided speed of sound in seawater, this would be 1450 m/s × 1.20 s ÷ 2 = 870 meters to the object. This methodology can be applied by the environmental engineer to direct the underwater robot accurately.