
The Taiwan Strait is a relatively shallow body of water, averaging approximately 60 meters (200 feet) in depth.
Its deepest points can reach around 170 meters (560 feet).
The shallow bathymetry of the Taiwan Strait presents significant operational challenges for large naval vessels, including submarines. This geographical characteristic directly influences strategic planning, particularly in light of recent discussions regarding "China and Taiwan’s “National Question”: The Battle Over Cross-Strait Unity."
The Strait's depth profile is a critical factor in the geopolitical landscape, which sees Taiwan and China as top connections by signal volume (82 and 61 tracked signals respectively). This environmental reality informs the strategic calculations of various actors, including the United States, which has 4 tracked signals.