

   SShhiippss DDaammaaggee DDaattaa

   AArrgguummeennttss::

       type: type: `"A"' to `"E"'

       year: year of construction: 1960-64, 65-69, 70-74, 75-79
             (coded as `"60"', `"65"', `"70"', `"75"')

     period: period of operation : 1960-74, 75-79

    service: aggregate months of service

   incidents: number of damage incidents

   SSUUMMMMAARRYY::

        Data frame giving the number of damage incidents and
        aggregate months of service by ship type, year of con-
        struction, and period of operation.

   DDAATTAA DDEESSCCRRIIPPTTIIOONN::

   SSOOUURRCCEE::

        P. McCullagh and J. A. Nelder, (1983), Generalized Lin-
        ear Models.  Chapman  Hall, section 6.3.2, page 137

