13 meters = big changes
![13 meters = big changes](https://planetary.s3.amazonaws.com/web/assets/pictures/_768x576_crop_center-center_60_line/103283/20171127_sls-block1b-ml-changes.jpg 768w, https://planetary.s3.amazonaws.com/web/assets/pictures/_576x432_crop_center-center_60_line/103283/20171127_sls-block1b-ml-changes.jpg 576w)
The items shown in red on this Ground Systems Development Office rendering show which major pieces of the mobile launcher must be removed, altered or added.
Red acronyms:
ICPSU: Interim Cryogenic Propulsion Stage Umbilical
CAA: Crew Access Arm
OSMU: Orion Service Module Umbilical
EFAU/EAFU: Exploration Upper Stage umbilicals
Green acronyms:
CSFSU: Core Stage Forward Skirt Umbilical
VSS: Vertical Stabilizer (System)
CSITU: Core Stage Intertank Umbilical
TSMU: Tail Service Mast Umbilical
ASPU: Aft Skirt Purge Umbilical
VSP: Vertical Support Post