---
type: Object
title: The Ferrick Tide Clock
description: A tidal clock pattern designed by Tomas Ferrick and sold by the Instrument
  Works in harbour and house sizes, geared to the purchaser's home port.
tags:
- kelvarra
- the-institute
- instruments
- tidal-survey
- port-ilvess
resource: raw/instrument-works-catalogue-1992.md
timestamp: '2026-07-16T15:03:08Z'
citadel_version: 0.3.0
---

# The Ferrick Tide Clock

The Ferrick Tide Clock is the tidal clock pattern sold by the [Instrument Works](../organizations/instrument-works.md), offered in a harbour size and a house size.[^s1] It is the same pattern that has served the harbour tower of [Port Ilvess](../misc/port-ilvess.md) since 1963, and by 1992 stood in its fourth series, taken up two years after the Institute's 1988 move to Corran Hill.[^s1]

## Movement

The clock's movement is [Tomas Ferrick](../persons/tomas-ferrick.md)'s own double-detent escapement, with the tidal train geared for the purchaser's home port; ports of unusual temper, the Fell Rocks among them, are respectfully declined.[^s2] Each clock is run at the Works against the transit series — the [Brann Tidal Survey](../projects/brann-tidal-survey.md)'s proving standard — for one full lunation before delivery, and its rate card is packed with it.[^s3]

## Pricing and waiting list

The harbour size is priced at two hundred and forty [skells](../concepts/skell.md), the house size at ninety.[^s4] The waiting list for either stands at just over a year; the Works, "which has buried harbour boards and outlived their successors, recommends ordering early and complaining to somebody else."[^s5]

## See also
- [Instrument Works](../organizations/instrument-works.md)
- [Tomas Ferrick](../persons/tomas-ferrick.md)
- [Port Ilvess](../misc/port-ilvess.md)
- [Brann Tidal Survey](../projects/brann-tidal-survey.md)
- [Skell](../concepts/skell.md)

## Sources
[^s1]: [raw/instrument-works-catalogue-1992.md](../../raw/instrument-works-catalogue-1992.md), lines 11-12 — the pattern's history since 1963, its fourth series, and the harbour/house sizes (ingested 2026-07-15)
[^s2]: [raw/instrument-works-catalogue-1992.md](../../raw/instrument-works-catalogue-1992.md), lines 12-14 — the double-detent escapement, home-port gearing, and declined ports (ingested 2026-07-15)
[^s3]: [raw/instrument-works-catalogue-1992.md](../../raw/instrument-works-catalogue-1992.md), lines 14-16 — proving against the transit series for one lunation and the packed rate card (ingested 2026-07-15)
[^s4]: [raw/instrument-works-catalogue-1992.md](../../raw/instrument-works-catalogue-1992.md), lines 16-17 — prices for the harbour and house sizes (ingested 2026-07-15)
[^s5]: [raw/instrument-works-catalogue-1992.md](../../raw/instrument-works-catalogue-1992.md), lines 17-19 — the waiting list and the Works' recommendation (ingested 2026-07-15)
