Too little rode and you will run out of chain in a deep anchorage or a blow; too much and you are carrying dead weight in the bow. Here is how to work out how much you actually need — and what type.
How much rode to carry
Start from the job the rode has to do: let you anchor at proper scope in the deepest water you realistically expect, with a reserve for a bad night. The sum is simple:
Rode to carry = deepest anchoring depth × scope ratio + reserve.
If the deepest you expect to anchor is 8 metres, at 5:1 chain scope that is 40 metres, plus a sensible reserve for a deeper spot or a night when you want more out. For most coastal cruising boats, that lands somewhere between 50 and 80 metres of rode.
| Cruising type | Typical rode to carry |
|---|---|
| Sheltered day-anchoring, shallow water | 30–50 m |
| Coastal cruising | 50–80 m |
| Deep or exposed anchorages, bluewater | 80 m+ |
The night you need extra scope is the night it is blowing hard and you cannot re-anchor easily. Carry enough that you are never scraping the bitter end when conditions turn.
All-chain or rope-and-chain?
Both are valid; they suit different boats and budgets.
- All-chain: holds well at lower scope thanks to its weight, resists chafe on rock and coral, and stows compactly. The downsides are weight in the bow and the need for a snubber to absorb snatch loads.
- Rope with a chain leader: lighter and cheaper, and the stretch of the rope absorbs gusts naturally. It needs more scope for the same holding and must be protected from chafe at the bow roller and on the bottom.
Sizing the chain gauge
Chain diameter should match your boat and — critically — your windlass gypsy, which is cut for a specific chain size and standard. Heavier boats need a heavier gauge for strength, but oversizing adds weight where you least want it and may not feed through the windlass. Follow your windlass manufacturer's chain specification and your anchor maker's sizing for your boat length and displacement, and confirm the chain calibration matches the gypsy before you buy.
Mark your chain
Rode you cannot measure is rode you cannot trust. Mark your chain at regular intervals — paint, cable ties or coloured markers — so you know exactly how much you have paid out and can set your scope accurately in the dark. Note the total length somewhere obvious so nobody runs it to the bitter end.
Rode down, watch on
Set your scope, then let HoldFast keep the watch with instant drag alerts. Free to download — premium is $4.99/year or $9.99 once for Lifetime.
Download on theApp StoreFrequently asked questions
Carry enough rode to anchor at proper scope in the deepest water you expect to use, plus a reserve. For most coastal cruising that means roughly 50 to 80 metres. Work it out from your maximum anchoring depth multiplied by your scope ratio, then add a margin for deeper or rougher nights.
All-chain holds well at lower scope and resists chafe, but is heavy and needs a snubber to absorb shock loads. Rope with a chain leader is lighter and cheaper and stretches to absorb gusts, but needs more scope and chafe protection. The right choice depends on your boat, windlass and cruising area.
Chain gauge should match your boat's size and your windlass gypsy. Larger, heavier boats need a heavier gauge, but going oversize adds weight in the bow and may not fit the gypsy. Follow your windlass manufacturer's chain specification and your anchor maker's guidance for your boat length and displacement.