Fine-Grained Categories of icebreaker:

• civilian:vehicle,
• social:activity,
• introductory:activity,
• maritime:installation,
• big:ship,
• instrumental:group,
• nuclear:vessel,
• commercial:ship,
• special:ship,
• large:vessel,
• small:activity,
• nuclear:installation,
• social:event,
• small:ship,
• special:vessel,
• noncommercial:craft,
• large:ship,
• extra:activity,
• specialized:craft,
• short:activity,
• specialised:vessel,
• smaller:ship,

Poetic Qualities of icebreaker: