This article proposes an analytical model for a conversion from Heavy Fuel Oil (HFO) to Liquide Natural Gas(LNG) dual-fuel engine in a fleet with three sizes of vessels in order to investigate the impact of the volatility of oil prices, and a declining Energy Return on Investment (EROI) on opting LNG …

This study shows that the main predation pressure in the Dutch Wadden Sea is found to be on calanoid copepods, being the main prey item of C. harengus, A. tobianus, C. edulis, A. aurita and M. leidyi. Bivalve veligers are also found to be widely ingested by predator species, with the main predators being …

Het gebruik van Dynamic positioning (DP) wordt op veel schepen toegepast waaronder op het schip de Aegir van het bedrijf Heerema Marine Contractors. Het DP systeem heeft hierbij een initiële positie input nodig wat verkregen wordt via GNSS plaatsbepalingssystemen. Aan boord van de Aegir bevinden zich …

To experience and appreciate the challenges involved in marine spatial planning (MSP), students enrolled in two MSP courses play stakeholder roles in a realistic serious game. The serious game is played with the participatory online MSP tool SeaSketch, and tackles the contemporary Dutch marine renewable …

Het Waddenfondsproject Súd Ie beoogt economie, recreatie en ecologie te combineren en te verbinden. Het project kent drie fasen, in fase 1 en 2 van het uitvoeringsprogramma van het project Súd Ie zijn o.a. vispassages, natuurvriendelijke oevers en paai- en opgroeigebieden aangelegd. Daarnaast worden …

The Nieuw Statendam is equipped with a program called ENIRAM. This program calculates the optimal engine configuration and load expressed in revolutions per minute of the propellers. The issue with this program is that it only looks at the main power plants and does not take the waste heat recovery system …

Using either freshly pulped or preserved seaweed biomass for the extraction of protein can have a great effect on the amount of protein that can be extracted. In this study, the effect of four preservation techniques (frozen, freeze-dried, and air-dried at 40 and 70 °C) on the protein extractability, …

To limit the pressure on the marine ecosystem, the European Unions’ Marine Strategy Framework Directive (MSFD) was developed to ensure sustainable use of the marine ecosystem. The goal of the MSFD is to achieve Good Environmental Status (GES). To achieve this goal, the MSFD prescribes using Ecosystem-Based …

Marine debris is a growing global problem. Due to the wide ocean dynamics worldwide, predicting the transport of floating marine debris, such as plastic, is difficult. Although large-scale distribution patterns and accumulation zones are recognised and reproduced by numerical models, small-scale prediction …

Research regarding relations between coastal vegetation types and accompanying erosion rates. Coastal erosion is a potential threat for ~100 million people that are living within one meter below mean sea level. Furthermore, it poses a threat to wildlife such as marine turtles, and plant communities that …