# 7.4 Hull Specification

### 7.4.1 Main dimensions

| Dimensions                         | \[m] |
| ---------------------------------- | ---- |
| Maximum length                     | 2.10 |
| Maximum width                      | 1.85 |
| Maximum height (including draught) | 1.20 |

### 7.4.2 Antenna

Antennas are allowed to be built over the height limit as long as there are no sensors attached or built over the height limit.

### 7.4.3 Visual Indicators

| Indicators    |                                             |
| ------------- | ------------------------------------------- |
| Red           | Kill switch activated. Propulsion disabled. |
| Yellow/Orange | Remote operation.                           |
| Green         | Autonomous operation.                       |

All three lights must be visible from all directions. During all weather conditions the lights should be visible from 100 metres. 


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://njord.gitbook.io/2026/7-technical-requirements/7.4-hull-specification.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.