First, you need to have the Hazardous Substances Inventory list set up. To learn how to do this, please refer to here: How To Add Hazardous Substances Inventory
Before we can add Hazardous Substances, we first need to ensure that this section is avaliable in your logbook.
This is something the Team at SeaLogs can help with - so please contact us, and it will only take a minute to set this up for you.
The Hazardous Substances will be displayed in the Fuel section, along with Oils added. eg.

To add details about any fluids that you've added that are classed as Hazardous Substances please click the black plus button, eg:
Next, select an Item from the list (the Fluid Type will fill in automatically). Record the amount Added, and Save.

Click on the black plus button to repeat the process.
Continue filling out your logbook as normal.
- Note if you don't see this section, please contact us (info@sealogs.com or help@sealogs.com).