US owner Hornbeck Offshore Services (HOS) has added four platform supply vessels (PSVs) to its fleet in a $36.6m cash deal.
The seller is compatriot Aries Marine, the company said.
For the price, HOS has got its hands on four high-spec US-flagged OSVs.
The first two are 3,800-dwt units built in 2014 and 2015 and the others are 5,500-dwt ships built in 2010 and 2011.
