Wondered this also Henry... here's what I found:

The Strait of Hormuz has a water depth typically ranging from 200 to 330 feet ( 60 - 100 meters) throughout much of its width, with some areas reaching over 200 meters near the Musandam Peninsula. It is a critical, shallow, and narrow maritime, commercial, and strategic waterway, vital for global oil shipping.

Key Details on Depth and Usage

Navigation Depth: Navigable channels are generally 46–61 meters deep, accommodating fully loaded oil tankers (draft of 20-25 meters). Variability: Shallow areas near the Iranian coast can drop below 25 meters, making them unusable for large vessels.

Key Chokepoint: It acts as the only maritime outlet from the Persian Gulf to the Gulf of Oman, which is why its depth is often termed a "maritime chokepoint".