| **Notebook** | Opening it pauses everything and shows only what you have already seen. Rule **S1**. | Design r4 |
| **Shelter** | A dry dock or the junction platform; enemies neither enter nor spawn there. You can repack and watch, but the surge clock keeps running. Rule **S2**. | Design Document r3, App. A |
| **Workshop / forecast relay** | The colony's two additive repairs: a workshop gives one extra starting module choice; a forecast relay makes the first intake known before departure. Each costs a full return's salvage. | Design r4 |
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| **Siphon** | A module that consumes one touching bundle for three units of charge, once — for a player who needs power and has only salvage. | Design Document §5 |
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| **Siphon** | A one-use converter: sacrifice it and one carried wet salvage bundle for three charge in its shelter-selected battery. Cargo need not occupy a neighboring cell. The choice is bankable salvage versus immediate power. | [Utility Modules — current U5](/Hold%20The%20Flood/Equipment/Utility%20Modules#siphon-u5-retained-targetfeed-and-overflow-defined) |
| **Arc** | An optional one-slot module that, while linked to a charged battery, makes the cutter's hits conduct from organism to organism through a dense crowd, draining the battery over about twenty seconds. | Design Document §5 |
| **Leak / drip** | Charge lost from a battery into the wet bundles it touches, shown as one drip per bundle. Happens whatever the links say. | Design Document, App. A |
| **Build expression** | The way a loadout shows a strategy. The Brief, Team and Tasks pages use this term; the design pages say **loadout expression** for the same thing. | Design r5 |
