5.157 in the Radio Frequency Table Allocation of Ireland.

Content Type
ITU FOOTNOTE
Title
5.157
Description
The use of the band 23 350-24 000 kHz by the maritime mobile service is limited to inter-ship radiotelegraphy
Source
https://search.itu.int/history/HistoryDigitalCollectionDocLibrary/1.43.48.en.101.pdf