U-boat — 4, Zelená ponorka 4

Nature protection: Climbing seasonally prohibited from November 1st to March 31st. Nature protection documents: Decision 2022-2026, Decision 2022-2026_Maps authority Nature protection PLA Bohemian Paradise

Climbing conditions in the Český Ráj PLA: - use public or marked paths to access the rocks and do not damage the vegetation cover - use only fixed protection and textile belay devices. - keep quiet, do not climb on wet or damp sandstone, do not disturb nesting birds - report bird nesting, wear shoes with smooth soles, or climb barefoot - do not damage or change the surface of the rocks (rope abrasion, chopping), do not remove plants and vegetation - always climb routes from below, the number of climbers in the team max. 5, do not use Top Rope - magnesium and other chemical agents are prohibited, rappel only on permanent rappel anchors - show your climbing license upon request - first ascent regime - see map polygons.

Nature protection: Climbing seasonally prohibited from November 1st to March 31st, exceptions apply to specific rocks. Nature Protection Documents: Decision 2022-2026, Decision 2022-2026_Maps OP authority CHKO Český Ráj