Rolling the Dice
When the team arrived, they found that the water in the surrounding area was crystal clear and serene. However, at its deepest, Lake Ontario is around 800ft to the bottom. In this particular area, the floor of the lake was unpredictable, dark, and hazardous. Since the water did not move very quickly in the area, sediment, trash, and hazards would sit on the bottom undisturbed. This presented a potential danger to the divers.
Doing the Research
Because of the potential dangers present, the team had to extensively plan their descent taking every factor into account. This was akin to the moon landing, where everything absolutely had to go perfect in every practice run to take the potential dangers of diving in hand. Even then, the team did not know what they were looking for, which posed so many more questions and dangers. In theory, they would have to dive down twice, once to discover what the object was, another time to retrieve it if it was as valuable as they assumed…