The Sandscale Wreck

A wreck off the Sandscale sea drags boats under. The fishers want it cleared.

Requirements

Meet the guildmaster at Sandscale Bank
He puts a coil of cut net rope on the counter. 'Three boats this month. Something off the deep wreck is dragging them under. We won't crew the run until it's cleared.'
Cast the deep line over the wreck
Your line goes slack inside a minute, then taut, then cuts clean. The water under the boat goes cold. There's something walking the deck of the wreck below you.
Charge a beacon at the conduit
You bind a beacon to a marker buoy and charge it at the conduit. Dropped over the wreck, it will hold light against the haunt long enough to put it down.
Drop the beacon over the wreck
The beacon sinks and burns. The water under the boat lights blue from below. Something comes up the anchor chain hand over hand. You meet it at the gunwale.
Put down the wreck-walker
It fought like a sailor who didn't know it was dead. You took it apart on the deck and threw the remains back over. The water under the boat goes warm again within minutes.
Cook the first clean catch
You bring in a hold of fish on the first cast of the new water. The spit cook fillets one and grills it on the spot. 'Cleanest fish off that wreck in fifteen years.'
Report to the guildmaster
He counts coin without looking up. 'Beacon trick. I'll have my boats carry one each from now on. The season's saved. The wreck stays where it is. Some of my crew's grandfathers are aboard.'