http://dwtcalcul.homepage.bluewin.ch/
Hans-Jürgen Hollstein born 1940 in Hamburg. (now Swiss)
Apprenticeship in engineering and shipbuilding in Hamburg
13 years with the merchant navy
last three years as chief engineer
on motor- and steam turbine driven OBO- and bulk carriers
trading worldwide with interchangeable crude oil- and dry bulk cargoes. During these years
supervision of OBO-new buildings in France and Japan for British and German owners.
1973 joined the Bernhard Schulte group in Hamburg as superintendent in charge of liquid gas carriers (LPG
LNG and Ethylene-carriers) as well as supervision of two LNG-/Ethylene-new buildings in Oldenburg / Germany.
1974 joined Tradax / Cargill International SA in Geneva to supervise the re-construction and lengthening of one OBO at a yard in Hamburg and four new OBO carriers built in Split / Yugoslavia. After a short stay of 8 months in Amsterdam as superintendent for the Cargill OBO fleet
the ship management was transferred to Geneva 1975 and again 1986 to Hong Kong (Orient Ship Management
OSM
Cargill owned).
Controlled the fleet as technical manager in Hong Kong during the period 1992 to 1995.
Beside the operation as superintendent and technical manager
was deeply involved in the design and plan approval
heading the supervisions and guarantee matters of new OBO carriers
Panamax bulkers
Molten Sulphur- and Orange Juice carriers
built in Korea
Japan
Spain and USA.
Acted as ship’s operator for the Orange-Juice Carrier and technical manager / consultant for the trading- and ship logistic groups as well as for the Orange-Juice department in Amsterdam.
This was the time understanding the difficulties to get hold of reliable data for realistic pre-fixture voyage calculations
like sensible ship’s speeds for different trading areas and seasonal zones as well as correct cargo intake figures for different seasonal zones considering draft limitations in ports with different water densities.
Prepared spreadsheets for exact cargo intake
Wants
Ship charterers or ship owners and ship operators interested in maximizing the cargo intakes/profits and who want to be in control of their vessels.
Have produced Excel spreadsheets for bulkers and tankers (more than 7000 vessels) which allow quick and precise pre fix voyage calculations and the verify the cargo figures given by the vessels and to prepare deadweight claims if vessels are short loading for unjustified reasons (undeclared bunkers on board
de-ballasting problems etc).
Professional experience
to present
ex Technical Manager
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Industry:
Maritime
Employment:
Full time employee
Languages
German
(Fluent)
English
Portfolio
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