Seafarer safety device, seafarer safety system, seafarer safety program, vessel activity inference device, report generation assistance system, and vessel activity inference program

A non-transitory computer-readable recording medium storing a vessel activity inference program, the vessel activity inference program causing a computer to serve as:

• a craft location data acquirer to acquire craft location data containing a chronological series of detected values indicating locations of a craft during a navigation;
• a specifier to specify, based on the craft location data acquired by the craft location data acquirer, activities performed by the craft;
• and
• an outputter to output activity data indicating the activities specified by the specifier, wherein
• the specifier has a function of specifying, based on the craft location data, each of (a) travel toward a search region in which search for a fishery is performed, (b) the search for the fishery in the search region, (c) fishing in the fishery searched, (d) offshore stay, and (e) travel to return to a port after the fishing, as the activities, and specifies the activities multiple times based on the craft location data from departure until arrival of the craft to specify the activities of different types performed during a period from the departure until the arrival of the craft, and
• the activity data indicates the activities of different types performed during the period from the departure until the arrival of the craft, and a time at which each activity is performed.

A seafarer safety device, comprising:

• at least one processor, wherein
• the at least one processor executes
• an evaluation process of evaluating, based on intensities of notification radio waves indicating existence of a crew on a craft and strengths of rocking motions of the craft detected by a craft rocking-motion sensor, whether the crew is in emergency circumstances, the notification radio waves being received from a wearable transmitting device that repetitively transmits the notification radio waves, the craft rocking-motion sensor repetitively detecting the strengths of the rocking motions, and
• an outputting process of outputting an emergency evaluation signal indicating a result of evaluation, when the crew is evaluated to be in emergency circumstances in the evaluation process.