Possible Clues:

• Frontiersman
• As a ground-breaker, I would need to be surrounded by support
• Trailblazing type has person in support
• Launch - one ramming coastal feature
• Initiator of enterprise needs one in support
• First explorer
• Person in support of leader
• NASA program that explored the outer planets
• Settler, one taking part in landing
• Innovator; first settler