Mariner 8 (also known as Mariner H) had onboard systems identical to Mariner 6, Mariner 7, and Mariner 9.
Mariner 8 (also known as Mariner H) had onboard systems identical to Mariner 6. Mariner 8 (also known as Mariner H) had onboard systems identical to Mariner 7. Mariner 8 (also known as Mariner H) had onboard systems identical to Mariner 9.