Ciphers made of Morse code

These three ACA ciphers first turn the message into Morse code, with an x between letters and xx between words, then encode the dots, dashes and x marks.

Fractionated Morse reads the Morse in groups of three symbols and swaps each group for a letter from a keyed alphabet. Morbit reads it in pairs and swaps each pair for a digit set by a nine-letter key. Pollux simply uses digits for dot, dash and x, with several digits for each so the pattern is harder to spot.

Spotting them

Fractionated Morse looks like ordinary letters. Morbit and Pollux are all digits. If a puzzle mentions Morse but shows only letters or digits, try these.