The maximum depth of the Strait of Hormuz has been reported to be 110m in its south. It has sometimes been observed that field measurement data recorded measured information at some specific points with depths greater than 110 meters, which may attribute those values ​​to measurement error. Therefore, in this study, using various recorded data (Persian Gulf Explorer 2018, WOD09, WOD13, ROPME1992), depths of more than 120m were investigated and compared with the depth data of the international GEBCO site. Using ODV software, temperature/salinity section maps were illustrated and compared at two different depths (one based on the maximum field-measured depth and the other based on the depth recorded in the GEBCO). The results showed that, contrary to the idea in studies that consider the Persian Gulf and the Strait of Hormuz without any trench, there are deep areas (even with a depth of about 200m) that are not shown by the GEBCO data, but are proven by the measurement data. According to available data, there are seven points around the strait where GEBCO has a large error. The results show that the maximum recorded depth measurement of the Strait of Hormuz, in the available historical data, is 248m in the east of the strait and with a depth of more than 187m in the west of the strait, which is not shown by the GEBCO. Therefore, in local studies around these areas (such as studies of water column, stratification, bed friction, deep water currents, etc.), special attention should be paid to the actual depth of the area and data from different sites should be trusted with caution.