MSA XTIRPA 30-48 Instrucciones Y Manual De Seguridad página 17

Use
(7.) Remove the locking pin located in the mid section of the
davit arm (A). Extend the inner mast to the desired length. Replace
the locking pin to secure the davit arm.
Fig. 14 Step 7A
US
Fig. 15 Adapter Base System 30-48" Reach
17
MSA/XTIRPA™ Adapter Base System 30-48" Reach