Ground tackle for Komodo has to solve two different problems: holding in deep, current-swept anchorages, and lying safely to a mooring buoy in a running tidal stream. Most production sizing tables assume neither. Under-specified gear here does not just risk the vessel — dragging inside a national park is a reef-damage event with regulatory consequences.
The anchoring environment
Anchorages in and around the park tend to be deeper than owners expect, with variable holding, sloping bottoms that fall away steeply, and current that reverses through the tide. A vessel anchored on a slope in reversing current can end up in a very different position from where it set, which is why the swinging circle calculation has to consider both directions and the bottom contour, not just a radius on a chart.
Wind and current are frequently not aligned. A boat with high windage lying across a tidal stream loads the ground tackle in ways a wind-only calculation does not predict, and the load reverses at the turn of the tide, which is exactly when a marginally set anchor breaks out.
Sizing the gear
The relevant inputs are displacement, windage area — which on a phinisi with masts and superstructure is considerable — the depths you will anchor in, and the current you will lie to. Practical consequences:
- Chain length. Deep anchorages need real scope, and scope needs chain in the locker. Owners routinely specify a chain length adequate for shallow cruising and then anchor in twice the depth with inadequate scope.
- Chain size and anchor mass. Sized above the minimum table value, given the loading conditions described above, not at it.
- Windlass capacity. It must retrieve the ground tackle plus the boat’s load in current, not merely lift the chain in still water. This is the specification most often set from a catalogue and most often found wanting.
- Snubber and chain stopper. Loads should be taken by a properly sized snubber and stopper, not by the windlass gypsy overnight.
- Secondary anchor. Genuinely useful in a place where dragging has consequences beyond the vessel.
Bow structure has to accept these loads. On refits we frequently find upgraded ground tackle installed on original bow structure that was never designed for it — see the refit page.
The mooring case
Where anchoring is restricted and mooring buoys are provided, the requirements change. The bow needs a fairlead and strong point capable of taking the full load in current, a bridle arrangement that distributes load and holds the vessel steadily rather than allowing it to sheer, and chafe protection that survives a night of loading and unloading as the tide turns. Chafe is the failure mode here: a line that looks fine at dusk can be badly worn by dawn where it passes a fairlead under cyclic load.
Pickup in a running stream is a seamanship and equipment question. A vessel with poor low-speed manoeuvring authority approaching a buoy in three knots of current is a difficult operation, which is one more argument for adequate thruster capacity — see bow thruster sizing.
The regulatory dimension
Anchoring is restricted or prohibited at sensitive reef sites within the park, and mooring buoys exist precisely to prevent anchor damage. Complying with that is both a legal obligation and a practical design constraint: your vessel must be equipped to lie safely to a mooring, not only to anchor. See Komodo National Park compliance. Requirements are administered locally and do change, so confirm current arrangements with the park authority.
Deck equipment and crew practice
Good gear badly handled still drags. The equipment decisions that support good practice are: a windlass control position with clear sight of the bow, adequate deck lighting for night operations, a depth display visible at the anchoring station, and a chain marking system the crew can actually read. On a commercial vessel, a written anchoring and mooring procedure with anchor-watch responsibilities is worth more than another size of chain.
What we check on survey
Anchor and chain condition and actual measured length rather than claimed length, windlass condition and performance under load, chain locker drainage and stowage, bow structure and fairlead condition, snubber arrangement, and whether the gear on board matches the gear in the specification. Discrepancies here are common on secondhand purchases — see pre-purchase survey.
Frequently asked questions
How much anchor chain does a Komodo liveaboard need?
More than shallow-water cruising figures suggest. Anchorages in and around the park are often deeper than expected with sloping bottoms and reversing current, so adequate scope requires real chain length in the locker, sized against the deepest anchorage you intend to use rather than the average.
What windlass capacity is needed for Komodo anchorages?
Enough to retrieve the ground tackle plus the vessel’s load in current, not merely to lift chain in still water. Windlass capacity set from a catalogue minimum is the specification most commonly found wanting once the boat starts working in tidal streams.
What matters when lying to a mooring buoy in current?
A bow fairlead and strong point rated for the full load, a bridle that holds the vessel steadily rather than letting it sheer, and serious chafe protection. Chafe is the overnight failure mode — a line that looks fine at dusk can be badly worn by dawn under cyclic tidal loading.
Talk to the build desk
Send the vessel details or the operating profile you want to run and we will tell you what has to be established before a number means anything. Quotations in USD. Construction, repair, refit and vessel-sale contracts are issued by PT Komodo Galangan Nusantara.