Summary: Marine insurance is the oldest line of insurance in the world. It also is the basis for one of the oldest rating bureaus in the country, American Association of Insurance Services (AAIS). The Mutual Marine Conference (MMC) was established in 1936. In 1947 the MMC merged with the Mutual Aircraft Conference to form the Transportation Insurance Rating Bureau (TIRB). In 1975, AAIS was incorporated as the successor organization to TIRB, adding personal and commercial lines. AAIS is unique among rating bureaus, in that it remains a non-profit association owned by its members.

The commercial inland marine program of the American Association of Insurance Services (AAIS) contains thirteen filed classes: accounts receivable; camera and musical instrument dealers; floor plan merchandise; implement dealers; jewelry dealers; mail; musical instruments; negative film; photographic equipment; physicians and dentists equipment; signs; theatrical property; and valuable papers and records. This article offers an analysis of these coverages.