What is the key difference between Navy dive tables and SSI dive tables?

The key difference between Navy dive tables and SSI dive tables lies in how they account for silent bubbles, or inert gas bubbles that may form during a dive. Navy dive tables have a more conservative approach, primarily focusing on ensuring that divers stay within safe limits to avoid decompression sickness, often without considering the possibility of silent bubbles. This can lead to more conservative dive profiles.

In contrast, SSI dive tables incorporate more advanced algorithms and research related to decompression theory, which include considerations for silent bubbles formed during ascent and descent. This inclusion allows for better management of the risk of decompression sickness, thus providing divers with more flexibility in their dive profiles and potentially allowing for deeper dives under certain conditions.

The other choices present different aspects but do not represent fundamental differences between the two types of tables regarding their primary usage and development.