π Key Concepts
β’ Facsimile (fax) in radio communications is about transmitting printed images or text so they can be reproduced at the receiving end.
β’ How radio facsimile (radiofax/WEFAX) is used for weather charts and maps at sea.
β’ Difference between still pictures on a screen, characters forming a picture, and printed images on paper for permanent record.
π Think About
β’ Which option clearly involves sending an image so that it can be reproduced as a hard copy at the receiving station?
β’ Which choices talk about things shown on a screen only versus printed on paper?
β’ Facsimile is often used for weather charts and maps at seaβhow are those normally received and kept on board?
β
Before You Answer
β’ Identify which option specifically mentions printed pictures rather than just images on a screen or characters.
β’ Check which description best matches getting a permanent paper copy of charts or images.
β’ Eliminate any choices that only deal with live video or ordinary text characters without clear reference to printed images.