DIEUWERTJE
In service: 1970 - 1980
Owner: NV Hijs- & Transport Maatschappij Goedkoop – Amsterdam; on 20-10-1977 Mammoet Transport BV - Amsterdam
Built: Delivered 12-31-1971
Yard: Machine Factory and Shipyard “De Volharding” v/h Nanninga & Meijer - Amsterdam.
Dimensions: 17.10 x 16.13 x 9.48 x 2.19 x 1.80 m.
Tonnage: 30.4 GRT
Registration number: 6204.B.Amst.1965; 20.06204 I.V.R.
Machines: 2x four-stroke 6 cylinder Cummins; in 1970, 2x four-stroke V12 cylinder Caterpillar Nos. 10378011 & 10378597; in 1973, 2x four-stroke V12 cylinder Caterpillar Nos. 99U5579 & 99U5580; In 1987 2x four-stroke 8 cylinder Caterpillar type 3408 DITA; in 1999, 2x two-stroke V12 cylinder General Motors type 12V.92TA nrs.12VF6783 and 12VF6750 from 1992
Power: 1,090 apk; in 1970, 800 MOT; in 1973, 900 MOT; in 1987, 900 MOT; in 1992, 1,200 MOT; 883 kW
Purchased: Built together in 1970 from the ALBERT GOODKOOP and the DIEUWERTJE GOODKOOP
Removed: On 09-05-1980 as ERIK to Anton Kooren - Rozenburg

Specifics: Composed of the tugboats ALBERT GOODKOOP and DIEUWERTJE GOODKOOP.
Sunk in November 1973 after collision with DAMCO 99 near Speijk.
On 13-01-1987 as ERIK to A.& K.Kooren VOF - Krimpen a/d IJssel.
On 13-01-1987 to vof A. & K. Kooren – Krimpen a/d. She was also rebuilt on the superstructure.
On 22-01-1990 as ERIK to C.& H.Heuvelman Shipping & Trading BV - Krimpen a/d IJssel.
On 22-01-1990 as AQUA TWIN to P.J.W.G.Wanders - Honselersdijk.
Sunk in 1992 in Maassluis and repaired at the Maassluise Machinefabriek SDMM.
On 30-10-2000 as SIERICK to G.J.P.Flikweert - Zierikzee.
On 20-03-2007 as ORIENT to Orient Duwvaart - Zwijndrecht.
On 29-06-2021 as CUNADO II to Cunado BV – Zwijndrecht.