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Hiccup's Diving Helmet is a helmet that Hiccup wore in Race to the Edge, Season 4. He uses it to dive to the sea floor to free the Submaripper by using Changewing acid to melt the chains. This Helmet allowed Hiccup to breathe underwater for an extended period of time. It was developed alongside the Diving Bell.
It's unclear if Hiccup made it himself or if Fishlegs made it, as when we first see it, Fishlegs is handing it to Hiccup shortly before he climbs into the Diving Bell. It's also unclear if it survived that first dive, as we don't see it again after Hiccup returns to the surface. It may have been knocked out of the bell and lost either when the Submaripper knocked the Diving Bell, breaking its legs, or when one of Vigo's catapulted boulders broke the pulley system with which it was being hauled back to the ship, sending the Diving Bell crashing back to the ocean floor.
Like the Diving Bell, the helmet appears to be made of Gronckle Iron and Death Song amber.It also seems to be a modified Berserker helmet. It has traditional Viking horns attached to the top, and a thick leather cowl collar to keep the water out.
- This is the first time Hiccup has worn Viking horns in the entire Race to the Edge series.
- The last time we saw him wear a horned helmet was during the events of Gift if the Night Fury 3-4 years earlier.