What this training covers
Marine first aid should be considered differently from ordinary workplace first aid because help may be hours or days away.
RYA's marine First Aid course includes topics relevant to boating such as:
Australian schools may also offer Australian first-aid qualifications or marine medicine courses.
Course names and content vary between schools, and this is a description of the training rather than one school’s syllabus. Check what a particular course actually includes — and on which boat — before booking.
Where this sits in the schemes
Training like this is taught both as a named certificate within a scheme and as standalone tuition by independent schools. If you want a certificate at the end, start from the scheme; if you only want the skill, an afternoon with a good instructor may serve you better.
Is this the right training for you right now?
Three questions — have you sailed before, what boat do you want to sail, and what is your goal — give you a starting course and the schools that teach it near you.