Situation – boat sailing perfectly – crew going according to plan, one bad case of sea-sickness. But…..broken pulpit – not repairable with compromised lifelines – making it very risky for anyone out of cockpit or on foredeck. Wind increasing 30k + regularly – visibility dreadful – not possible to see those on foredeck or hear, and not possible to identify sheets in cockpit. Conditions worsening as predicted. Skipper comes to conclusion that not safe to continue so will seek safe haven.