CalMac have become the first transport operator in the country to use the Any Disability symbol on board their vessels.
The sign was designed by Grace Warnock, a pupil at Preston Lodge High School in Prestonpans.
Grace, who has Crohn’s Disease, designed the sign following her own experience of using accessible toilets, including receiving negative remarks from adults who did not appreciate or understand her condition.
The sign has now been evolved by design agency StudioLR with the aim of having it recognised by the British Standards Institution as the generally accepted sign for accessible facilities.
West coast operator CalMac is rolling out the new symbols across its 33 vessels and at port locations.
CalMac estimate they transport around half a million disabled passengers.
"The wheelchair symbol is commonly used on accessible toilet signs and Blue Badge parking permits, however this symbol doesn’t represent the people with wide-ranging impairments who use these facilities and services," said CalMac’s Transport Planning Manager, Demi Wylie.
"People with a hidden disability have the right to access facilities and services without having to explain their personal circumstances. It’s about building awareness of this and we hope that many more organisations will join us and adopt the new signs."