solo diving
recreational diving without a dive buddy present who is capable of a rescue under the reasonably foreseeable circumstances of the planned dive
en-GB/ˈsəʊləʊ ˈdaɪvɪŋ/
en-US/ˈsoʊˌloʊ ˈdaɪvɪŋ/
recreational diving without a dive buddy present who is capable of a rescue under the reasonably foreseeable circumstances of the planned dive