• | Temperature Provide the current water temperature. Once the salinity and temperature information is provided, the ME70 calculates the sound speed and absorption.
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• | Salinity Provide the current salinity. Once the salinity and temperature information is provided, the ME70 calculates the sound speed and absorption.
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• | Acidity The equations used by the ME70 to calculate the absorption requires a value for acidity. Unless you have any specific reasons to apply a specific value, use the default value of 8 pH.
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• | Depth The equations used by the ME70 to calculate the absorption and the sound speed requires a value for depth. This is the current depth under the keel.
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• | Latitude The equations used by the ME70 to calculate the sound speed requires a value for latitude. This is the vessel’s geographical latitude. For increased accuracy, you are permitted to provide a manual latitude. Unless you have any specific reasons to apply a specific value, use the default value of 45 degrees.
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• | Calculated Select Calculated to allow the ME70 to calculate the sound speed and the absorption based on the parameters you have supplied.
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• | Manual This option allows you to input the sound speed manually. This can be relevant if neither a sound speed sensor nor a CTD (Conductivity Temperature Depth) sensor is available.
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• | Profile Select Profile if you want the ME70 to use measurements from the active profile.
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