Cypriot floatel owner Prosafe has seen utilisation cut back in 2017.
The figure was 36.1% in the fourth quarter, against 43% a year ago.
For the whole year, the figure was 38.4%, down from 43%.
Safe Caledonia finished a Total contract in late October, and is now laid up in the UK.
Safe Concordia, Safe Zephyrus, Regalia, Safe Bristolia and Safe Astoria were idle in the quarter.
