Cheaper ferry fares based on ‘road equivalent tariff’ were introduced on the Rhubodach-Colintraive route - and throughout the Clyde and Hebrides - on Monday.
The cost of a return trip on the short Kyles crossing falls to £2.20 for a passenger and £11.50 for a car.
RET fares came into effect across the CalMac network on Monday at the start of the company’s 2015-16 winter timetables.
Lower RET fares were first piloted on routes to the Western Isles, Coll and Tiree in 2008, with Islay, Colonsay and Gigha following in 2012 and Arran in October 2014.
Other islands benefiting for the first time from the new fares structure on Monday include Cumbrae, Mull, Iona, Barra, Skye, Raasay and the Small Isles.
Rothesay ferry passengers have been paying the new RET rate since October 1, when Bute’s main ferry link was diverted to and from Gourock due to major repairs at the Wemyss Bay terminal.