use. Ternan earlier sailed the route to Sandoy, and before the subsea tunnel to Vágar opened in 2002, it shuttled together with Sam between Vágar and Vestmanna. M/S Sam - the ferry to Kalsoy M/F Sam was built in 1981 and was earlier in service on the route between Vágar and Vestmanna. Since the opening of the Vágatunnilin in 2002 Sam sails the route to Kalsoy; the first ro-ro car ferry to the island. M/F Sildberin - the Skúgvoy ferry M/F Sildberin was built in 2014 and plies the Skúgvoy-Sandur route. The name refers to the Atlantic puffin carrying sandeel (sild) in its beak. HSC Erla Kongsdóttir - the replacement ferry The construction of HSC Erla Kongsdóttir (white wagtail) was commissioned by Strandfaraskip Landsins in 2018 as a support ferry for other routes, especially when other ferries need maintenance (except route 7 to Suðuroy). Numerous similar high speed catamarans (hurtigbåt) have shown suitable for the Norwegian coast. She has place for up to three cars and is equipped with a ro-ro. Erla was delivered to the Faroe Islands in November 2020 and put in service on 7 December. Her maiden voyage was delayed due to misfitting ramps in Tórshavn and Nólsoy, especially at high and low tide. On the first official day of service, swell-related vibrations shattered several windows, leaving the ferry out of order for weeks. This propelled public debate about the use of high-speed catamarans in Faroese waters. It also raised questionmarks around Strandfaraskip Landsins' credibility, which at the same time was accused of being little forthcoming with its network redesign in response to the new Eysturoyartunnilin. Another boat, Jósup, is regularly commissioned by Strandfaraskip to replace vessels that are out of order. MF Herjólfur III - the extra freight ferry to Suðuroy In May 2022 Strandfaraskip Landsins signed a long-term rent agreement with the Icelandic Road Administration Vegagerðin to lease the ferry Herjólfur III, which used to ply the route between the Icelandic Mainland and Vestmannaeyjar. The ferry will insert freight-only services on the Tórshavn-Suðuroy route to relieve Smyril, but will also take passengers when Smyril is out of service due to issues, maintenance or inspection. The lease lasts until at least autumn 2023. Earlier sea routes replaced by subsea tunnels The sub-sea tunnels to Vágar (2002) and the Northern Isles (2006) dismantled two important ferry links. Streymin Bridge (1943) and Norðoyrartunnilin (1946) had suspended the ferry