OptionalheliumFIT helium_content in percent.
OptionalmessageFIT message_index, including its source flags.
OptionalmodeFIT dive_gas.mode enum value.
OptionaloxygenFIT oxygen_content in percent.
OptionalstatusFIT dive_gas.status enum value.
Source-native FIT dive-gas configuration. Values retain the FIT parser's decoded units: helium and oxygen contents are percentages.