The USCG has recently discovered deficiencies in the entries in oil record books where the entries did not correspond to the bilge alarm data being displayed on the bilge alarm/oil content meter. Namely, the bilge alarm must record the date, time, alarm status and operating status of the bilge separator.
As the Britannia P&I Club informs, the bilge alarm should also store this data for at least 18 months and must also be capable of displaying or printing the data as and when required by...
https://safety4sea.com/uscg-warns-about-bilge-monitors-not-recording-information-properly/