Merchant Marine Revitalization Act of 1990

[AI summary unavailable — showing source text] Merchant Marine Revitalization Act of 1990 - Amends the Merchant Marine Act, 1936 to modify the authority and responsibility of the Secretary of Transportation with regard to investigating, determining, and keeping certain records concerning sailings and types of vessels. Requires that ocean services, routes, and lines determined essential on the date of enactment of this Act continue to be determined essential. Deems, for purposes of operating-differential subsidies (ODSs), vessel operations between and among foreign ports on the essential ocean services, routes, and lines to be vessel operations on such services, routes, and lines. Revises the requirements for ODS application approval, provisions regulating the amount of ODS payments, and the types of costs and services which may be subsidized. Sets forth special rules regarding bulk cargo carrying service. Regulates ODS payments for voyages involving coastwise or intercoastal trade and stopping at a port in the State of Hawaii. Extends the period of subsidizable life of vessels meeting certain requirements in specified circumstances. Prohibits payments for an essential bulk cargo carrying service (currently, an essential service…