# Anchor Chain Scope & Length — Rode Calculator for Boaters

> Rode Calculator for Boaters (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/anchor-chain-scope-and-length/id6761676477 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities, Productivity
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-04-08
- Data updated: 2026-07-17
- User reviews in markdown: https://appshunter.io/ios/app/anchor-chain-scope-and-length/id6761676477/reviews.md

## What is Anchor Chain Scope & Length?

Dragging anchor at 2 AM because you let out too little rode? Not sure which scope ratio to use for tonight's weather? This app calculates exactly how much chain or rope to deploy for safe anchoring.

SCOPE CALCULATOR - Enter water depth, freeboard height, tide range, and weather conditions. Calculates required anchor rode length for all-chain, chain-and-rope, or all-rope systems. Shows minimum and recommended scope with swing radius.

SCOPE TABLE - Quick reference for depths 5 to 100 feet at scope ratios 3:1, 5:1, 7:1, and 10:1.

ANCHOR GUIDE - Compare Danforth, Plow/CQR, Bruce/Claw, Mushroom, and Navy types with holding power ratings and best bottom type for each.

BEAUFORT SCALE - Wind speed to sea state reference (Force 0-12) with recommended scope ratio for each condition.

Built for sailors, cruisers, and powerboaters. Supports metric and imperial. Works offline. No account or login required.


## Version history (last 4 releases)

### 1.0.3 — 2026-07-07

Added a More Pro Tools section to discover related field calculators.

### 1.0.2 — 2026-04-25

Refreshed app icon for a cleaner, more recognizable look on your home screen.

### 1.0.1 — 2026-04-12

Bug fixes and performance improvements.

### 1.0 — 2026-04-08

No release notes.

## More apps by Shanghai Sheyuan Network Technology Co., Ltd.

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- [Concrete Block Wall Est](https://appshunter.io/ios/app/concrete-block-wall-est/id6760607814)

All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-17.*