This article will guide you on how to add and edit a Feeder vessel to your Construction case.

Feeder vessels can remain offshore for extended periods, carrying multiple tasks, transferring them to the installation vessel as deck space becomes available, and transiting between installation sites as required.


Learn how to configure your case for feeder operations on our Configure feeders page.


Adding a Feeder vessel

1. Open your case and go to  Build → Logistics → +Add 

2. You will then have a selection of vessels that you can add. Click on Feeder vessel

3.  When you select the vessel type you want to add you will be directed to the selection of that vessel in your input library. Click on the instance you want to add.

4. Complete the necessary information on how the vessel should be used. In this case the number of vessels you will need, shift, homeport, etc.

  • Name: The name of the vessel.
  • Number of units to add: How many feeder vessels to add.
  • Port: it is mandatory to add the port. If you have not added a port to your case yet, you will not be able to add the vessel.
  • Lead time: Time required to prepare the vessel prior to deployment.
  • Availability: The daily availability of the vessel 
  • Alter vessels settings: Here you can define if the shift time is constant or if it alters. 
    • by date and the settings will repeat annually: This option lets you assign the vessel to only be available within the period you have selected. In the example below, the vessel will be available from January 1st to April 5th each year.
    • periodically and specify durations by number of days: This option lets you assign the number of the days the vessel will be available, at which point, it will be unavailable in the same number of days. In the example below, the vessel will work for 14 days, then have 14 days off, before it starts it's rotation again for 14 days. 

  5. Click on Next and then Add

Editing a Feeder vessel

1. Go to your Feeder vessel and hover your mouse over it and click on it.

2. Add or edit all necessary information. Sections available are:

3. See more detail on each section: 

Members

If you click on Feeder vessel 1, the adjustments to the information added can be made when inserting the vessel; this is a shift, availability, port, etc.

Note: You need to specify any port.

Parameters

Only optional remarks, for reference only, are available here.

Processes

Please see this article on the Processes.

Fuel Consumption 

  • Fuel unit: Choose between litre or tonne 
  • Fuel consumption in transit (loaded): The fuel consumption when the vessel is in transit with the equipment 
  • Fuel consumption in transit (empty): The fuel consumption when the vessel is in transit without the equipment
  • Fuel consumption in jacked-up mode: The fuel consumption when the vessel is jacked-up
Cost

In this section, you can define the cost involved with the vessel. 

1. Define the currency 

2. Add any cost you want to report on. Some examples of the cost you can manage are: 

  • Cost of consumables per day offshore
  • Day rate
  • Fuel Cost: The cost is based on the fuel unit, so if the unit is set to litre, the fuel cost will be per litre; if the fuel unit is set to tonne, then the fuel cost will be per tonne. 
  • Mobilisation cost 
  • Port fee

Data Time Series

You can also add a cost time series, so your cost differentiates by year. This is done by clicking on the Open Time Data Series button.

Set your year range starting with 1 and how many years you want to simulate and click  Update- the actual year is derived from the operational start year on the assets (if your operational start year is set to 2021-xx-xx, year 1 is 2021, year 2 is 2022 etc.), to which you can add the cost per year.

Capacity

You can bundle multiple work orders on the same feeder vessel using the Capacity tab.

  • Maximum required capacity defines how many tasks the feeder vessel can carry.
  • Minimum required capacity controls how much of the capacity on this transport that needs to be filled before it can leave the base. The minimum waiting time set on tasks will override this parameter.
  • Maximum capacity per transfer to HLV sets how many tasks the feeder vessel can transfer to the HLV at once. It's how you can define the HLV deck space. If the feeder is still carrying tasks after the transfer takes place, it will continue to the next installation location and await the HLV there to transfer them.


4. Click Save.