An abandoned lifeboat at world’s end

Via A Blast from the Past:

The unidentified whaler or ship's lifeboat found abandoned on Bouvet Island on 2 April 1964. The boat bore no identifying marks. There were signs that survivors might have made it to shore, but no trace of them has ever been found.

Ship speed mechanics

There are already some cursory ship movement mechanics in various places (Labyrinth Lord and the DMG, for example), but if your campaign is conducted largely on the water you might want something more interesting. I should also say that the following rules are a work in progress. I'd appreciate feedback.

I don't want to get too crazily simulationist here. There are well known real-world formulas for all of this stuff, but they're a little complicated for use in play. I asked myself: what sorts of sailing situations do I want the rules to highlight?

• Longer ships tend to have a higher speed.
• Wind is a big factor.
• Ships with higher displacement tend to be slower (like encumbrance).
• Being able to carry a larger sail area means more speed, but only to the point where there's enough wind to fill those sails.
• A racing yacht or warship will be faster than a cargo ship of the same length.
• In light winds, a smaller ship may be able to out-sail a larger ship carrying lots of cargo.

This is what I came up with. A ship has three attributes: Length, Sail, and Displacement. To determine the current velocity of a ship, you take those attributes and combine them with Wind.

V = W ( S + L - D )

This looks like a lot of variables for use on the fly, but S+L-D isn't going to change much once the ship is under way, unless the crew starts throwing cargo overboard. And that could be fun.

This only works if Sail is less than or equal to Wind, so the full formula would be (feel free to correct my probably nonsensical math notation) something like V = W (S + L - D), S ∈ [0,W]. A ship flying too much sail wouldn't gain any speed, would handle poorly, and might even capsize.

I haven't yet worked-out the range of these numbers, or how they translate into feet and knots and tons and so forth. They might have a range of perhaps 0-12, so a ship with a Length of 3 would be 30' long. I'll think more about that tomorrow.

Random encounters for sea crawls

How would a sea crawl work?

Sailing from point A to B—even with an accurate map and a skilled navigator—the characters will find more than empty ocean. The referee will make periodic checks for random encounters, perhaps a 1 in 6 chance per 5-6 mile hex through which the characters sail. Those encounters might involve aquatic or flying monsters, but they could also be sightings of other ships, land, or even a change of weather.

The referee can prepare a chart for each of these possibilities: islands along the characters' course, other ships know to sail those waters, and so forth.

When the d6 roll for a hex indicates a random encounter, the referee can roll 1d12 against this chart to determine the nature and direction of the encounter:

Depending upon weather conditions and if the characters maintain an active watch, they may be able to avoid the encounter or sail to meet it.

This image and text is © Paul Gorman 2011, and licensed under the Creative Commons Attribution NonCommercial License. Also available as an EPS file suitable for print use.

Isle of Oxuders (Sea of Os'r)

Here's my first little islet for the Sea of Os'r project. It's called the Isle of Oxuders [PDF]:

At high tide, the Isle of the Oxuders appears to be two tiny islands.
The megalith is visible from a considerable distance to anyone keeping active watch. However, from the sea, it may be mistaken for a natural rock formation. The islands’s other points of interest are not evident unless the party makes a landing.

There is a 2 in 6 chance the cast-away will spot the PC’s vessel, and ignite a signal fire on the highest point of the island, which otherwise appears uninhabited.

Boats landing on the beach at low tide must contend with oxuders, who often surprise by launching themselves from concealed burrows in the sand.

Isle of the Oxuders map teaser

I'll be working late tonight, and won't be able to post the full PDF of my island until I get home. Since the scan is done, though, I thought I might as well post this teaser:

Request for 3-hour islets

A post at Planet Algol asked: does the OSR need an adventure path? It's not a bad idea, if—as migellito suggested—we use Telecanter's idea of an island hopping campaign:

what if there were one page island and people wrote a bunch of them. Then you might have a campaign that you could pick and choose from a variety of isles.

A bunch of us recently posted one hour dungeon maps. Will anyone join me in jump starting the island hopping "Sea of Os'r" project with a 3-hour islet? (See the Wikipedia islet page for some inspiration.)

UPDATE: I finished my first islet, Isle of the Oxuders.

UPDATE 2: Lands of Ara is hosting the Sea of Os'r Adventure Path page. Check it out!