This document specifies requirements for indicator lights to show the status of freight-container-handling spreaders and grappler arms.

It is applicable to:

a) container-handling spreaders with twistlocks for handling unladen and/or laden freight containers;

b) grappler (bottom lift) arms for handling semi-trailers and swap bodies;

when fitted to:

— counterbalance lift trucks, with masts, as defined in ISO 5053‑1:2015, 3.3;

— rough terrain trucks, with masts, as defined in ISO 5053‑1:2015, 3.7;

— non-stacking low-lift straddle carriers, as defined in ISO 5053‑1:2015, 3.18;

— stacking high-lift straddle carriers, as defined in ISO 5053‑1:2015, 3.19;

— variable-reach trucks, as defined in ISO 5053‑1:2015, 3.20;

— rough-terrain variable-reach trucks, as defined in ISO 5053‑1:2015, 3.21;

— variable-reach container handlers, "reach stackers", as defined in ISO 5053‑1:2015, 3.23;

— counterbalance container handlers, as defined in ISO 5053‑1:2015, 3.24.