Page 2nd Cover: of Maritime Reporter Magazine (March 15, 1973)

Oppama Shipyard uses computer techniques on a large scale to improve work quality, speed pro- duction and save on labor. One of the more unusual methods used in this shipyard is the

Sumitomo Egg-box Assembling (SEA) system.

Transverse members are precisely slotted by NC automatic cutters and are then clamped in accu- rate alignment by special SEA guide jigs. Longi- tudinal members are then introduced through these slots by a second set of SEA guide jigs, after which all joints are welded by automatic fillet welding machines. This results in a solid interlocking parallel frame (Egg-box) with the following advantages: 1) Collar plates are no longer required 2) Tack-welding is simplified 3) Welding work is reduced by a third 4) Elimination of lap joints permits automatic welding

Good ships start off in good yards. Sumitomo's adoption of the most modern facilities in its new 133 acre Oppama Shipyard means you get work- manship, performance and scheduling that's bet- ter than ever before. «0> SUMITOMO w SHIPBUILDING & MACHINERY CO., LTD.

Head Office: 2-1, Ohtemachi 2-chome, Chiyoda-ku, Tokyo, Japan

Telex: J22264 Cable: SUMIJUKI TOKYO

Oppama Shipyard: 19, Natsushima-cho, Yokosuka-shi, Kanagawa, Japan

Telex: 3852-408 Cable: SUMIJUKI OPPAMA

New York Office: 17 Battery Place, New York, N.Y. 10004, U.S.A.

Telex: 232699, 422145 Cable: SUMIJUKI NEWYORK

London Office: 35, New Broad Street, London, EC2M 1NH, England

Telex: 886450 Cable: SUMIJUKI LONDON EC2M 1 NH