The amateur radio frequency of 146.52 is the general calling frequency in the 2 meter band, not a reserved emergency frequency.
When Cabe and Toby argue about who booked the lighthouse, Toby says it is booked by him and Cabe replies "not THIS weekend".
However, Toby says he has booked for the 22nd and Cabe for the 27th. They can't both be weekends.