Cal-Mac offered more calls to Port Askaig. Each winter Iona returned to Oban, relieving Claymore and usually had her own refit in February or March, sometimes at Govan, but more usually in Greenock. Losing her crane in 1983 and a Perspex canopy on her limited open deck space, she was extensively refurbished in 1984. She continued to be bothered with mechanical trouble, usually her gearboxes. In May 1989, Iona was once again displaced by Claymore, cascading to the Islay station on the commissioning of . Iona took over the Mallaig - Armadale service. For the first time in sixteen years, she was again on a purely hoist-loading route, until she opened linkspans at Mallaig and Armadale on 1 April 1994. She was a great success at Armadale seeing an increase in traffic, and offering a varying routine of weekend sailings from Mallaig to Castlebay, Lochboisdale. In winter she relieved widely throughout the fleet. It was not deemed worth massive alterations for her to remain in year-round Cal-Mac service. With the arrival of a new in July 1998, took over the Mallaig - Armadale run and Iona was placed on the sale list. She was sold during the 1997 season to newly reformed Pentland Ferries, eager to revive a Pentland Firth car ferry service from Gills Bay in Caithness to Burwick or St Margaret's Hope on Orkney. Renamed MV Pentalina-B, it was several seasons before she took up the Gills Bay - Orkney service. In plain red and black funnels, she had an unexpected Cal-Mac charter in May 1998, when sustained a major breakdown before the new was ready for service. She maintained the Oban - Craignure service for just under three weeks, in partnership with . Pentalina-Bs hoist and side ramps were removed in the summer of 1999. From 2006 to 2009 Pentalina-B was chartered out in her off-season, to carry livestock across the English Channel from Dover. She was chartered to Cal-Mac in December 2008, operating the Ullapool - Stornoway freight run in place of . She was again chartered to Cal-Mac in April 2009, operating a freight run from Kennacraig to Port Askaig. She was sold in late 2009 to an owner in Cape Verde. and passed through the Irish Sea on 10 January 2010, en route for Mindelo. On the delivery voyage, she suffered water ingress and was towed to Brest Roads for repair. In June 2014