According to Wikipedia > The vessel was expected to resurface at 18:10 ADT.[16] Authorities were notified about the incident at 18:35 ADT. https://en.m.wikipe

According to Wikipedia > The vessel was expected to resurface at 18:10 ADT.[16] Authorities were notified about the incident at 18:35 ADT. https://en.m.wikipedia.org/wiki/2023_Titan_submersible_incident https://en.m.wikipedia.org/wiki/2023_Titan_submersible_incid... One could argue that the delay once communications were lost is reasonable until the sub was overdue back.