Impression is a synonym of Notion. Notion is related to Transport. Boat can be used for Transport. Boat is related to Naval. 
Fleet is a type of Collection. Pack is a type of Collection. 
Impression <--Synonym--> Notion <--RelatedTo--> Transport <--UsedFor-- Boat <--RelatedTo--> Naval 
Fleet --IsA--> Collection <--IsA-- Pack 