For echo sounders, the distance actually traveled is two times the distance to the seafloor from the source. transducer (from the transmission source, to the bottom and back again). This results in a significant. source of signal loss for the system receiving the sound pulse, which must be compensated for at the.
Average Weather in Hilton Head Island South Carolina, United States. In Hilton Head Island, the summers are hot and oppressive, the winters are cold and windy, and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 42Â°F to 89Â°F and is rarely below 30Â°F or above 95Â°F.
Weather in Hilton Head Island in January. The average maximum daytime temperature in Hilton Head Island in January is a comfortable 14Â°C (57Â°F). There are usually 6 hours of bright sunshine each day, which represents 55% of the 10 hours of daylight. The average sea temperature in and around Hilton Head Island in January is 17Â°C (63Â°F).