Lost at Sea: Enhance Team Dynamics with This Exercise

What Is the Lost at Sea Exercise?

Lost at Sea is a team decision-making exercise where participants rank 15 survival items individually, then as a group, and compare their answers against US Coast Guard expert rankings. It takes about 45 minutes and reveals how your team handles disagreement, consensus, and the gap between individual and group judgment.

The scenario: your yacht has caught fire and sunk in the South Pacific. You and your crew are in a life raft with 15 salvaged items. Each person ranks them from most to least important for survival. Then the team produces a single combined ranking. Finally, you score both against the expert answers.

The exercise was originally developed for the US Coast Guard and has been used in organisational development for decades. It works because it creates a low-stakes argument about something concrete. Everyone has an opinion about whether a mirror or a fishing kit matters more. The debate is the point.

I’ve run this exercise with teams at every stage, from newly formed groups that barely know each other’s names to veteran teams that think they have nothing left to learn. It works on all of them, because it exposes something every team needs to see: the gap between what individuals think and what the team decides, and whether that gap makes the team smarter or dumber.

Why This Exercise Works for Team Building

Lost at Sea forces teams to practise consensus under time pressure, exposes how individual and group decisions differ, and answers a question every manager should care about: does this team make better decisions together or apart?

Most team-building activities ask people to do something they’d never do at work. Trust falls, escape rooms, cooking classes. Those might be fun, but they don’t tell you anything about how your team makes decisions when the stakes are real and the clock is ticking.

Lost at Sea is different. It puts people in a structured disagreement with a right answer at the end. That combination is rare. The disagreement reveals how the team communicates. The right answer reveals whether they got smarter together or just louder.

Research on group decision-making supports this. A DePaul University analysis of structured group exercises found that teams using consensus-based ranking methods consistently outperformed teams relying on majority vote or leader-decides models, but only when the group process was facilitated rather than left to sort itself out. The exercise works because it gives the facilitator a framework to observe and intervene.

What you’ll see in 45 minutes that takes months to discover otherwise:

• Who dominates the conversation and who gets talked over
• Whether the team’s answer is better than the smartest individual’s answer (it should be, but often isn’t)
• How the team handles the moment when two people are certain and disagree
• Whether the quiet person in the room had the right answer all along

That last one happens more often than you’d think. I’ve watched the person who knew the most about survival sit through the entire discussion without saying a word, because nobody asked them.

The 15 Survival Items

Here are the items participants must rank. The scenario assumes the yacht has sunk, survivors are in a rubber life raft in the South Pacific, approximately 1,000 miles from land. The 15 items below were salvaged before the yacht went down.

1. Shaving mirror
2. 2-gallon can of oil-gas mixture
3. 5-gallon can of water
4. Case of army rations
5. 20 square feet of opaque plastic sheeting
6. 2 boxes of chocolate bars
7. A fishing kit
8. 15 feet of nylon rope
9. A floating seat cushion
10. A can of shark repellent
11. A bottle of 160-proof rum
12. A small transistor radio
13. Maps of the Pacific Ocean
14. Mosquito netting
15. A sextant

Give each participant this list on paper with space to write a ranking from 1 (most important for survival) to 15 (least important). No internet access. No discussion during the individual phase.

A note for facilitators: the items are deliberately chosen to create disagreement. Several items sound useful but are actually worthless in context (the sextant, the maps, the mosquito netting). Others sound trivial but are critical (the mirror, the oil). The exercise only works if participants don’t already know the answers.

How to Run the Exercise: Step by Step

The full exercise takes 45 to 60 minutes, split into individual ranking, group discussion, scoring, and debriefing. Here’s exactly how to run it.

Step 1: Set the Scenario (5 minutes)

Read the scenario aloud or hand it out printed:

You have chartered a yacht for a holiday trip across the South Pacific. Due to an unforeseen fire, most of the yacht has been destroyed and it is slowly sinking. Your position is unclear because the fire destroyed the navigation equipment. You estimate you are approximately 1,000 miles from the nearest land. You and your friends have managed to salvage 15 items. In addition, you have a rubber life raft and a box of cigarettes, matches, and five £5 notes.

Make sure everyone understands: they are ranking the items for survival, not for comfort. The goal is rescue, not self-rescue.

Step 2: Individual Ranking (10 minutes)

Hand out the ranking sheets. Each person works alone. No discussion. Set a timer for 10 minutes. Walk around and observe who finishes quickly versus who agonises. Both tell you something.

Step 3: Group Discussion and Consensus Ranking (20 minutes)

Put people in groups of 4 to 6. Their task: produce a single group ranking that everyone can agree on. Not a vote. Not an average. A consensus.

This is where the exercise comes alive. Watch for:

• The dominator. Someone who talks first and loudest, steering the group toward their individual answers.
• The persuader. Someone who changes others’ minds through reasoning rather than volume.
• The silent expert. Someone who ranked correctly but doesn’t speak up because the group has moved on.
• The compromiser. Someone who gives in to keep the peace, even when they know the group is wrong.
• The process person. Someone who tries to structure the discussion (“Let’s go item by item”) versus the free-for-all approach.

Don’t intervene unless the group gets stuck. Let the dynamics play out. Your job during this phase is observation, not facilitation.

Step 4: Score the Results (5 minutes)

Hand out the expert answers (see next section). Each person calculates two scores:

• Individual score: the sum of absolute differences between their individual ranking and the expert ranking.
• Group score: the sum of absolute differences between the group ranking and the expert ranking.

Lower scores are better. A score of zero would mean a perfect match with the experts.

Step 5: Debrief (15 to 20 minutes)

This is where the actual learning happens. See the debriefing section below.

Expert Answers: US Coast Guard Rankings

The expert rankings below are based on US Coast Guard guidance for open-ocean survival situations. The core principle: signalling for rescue matters more than self-navigation, water matters more than food, and passive tools beat active ones.

The pattern most participants miss: the top items are about signalling for rescue, not about navigating to safety. The Coast Guard’s position is that survivors in open ocean are almost always rescued by others, not by sailing to land. The mirror and the oil are signalling tools. The sextant and maps, which most people rank high because they “sound navigational,” are functionally worthless without supporting equipment.

This is the insight that makes the debrief interesting. The items that seem most important are often the least useful, and the items that seem trivial (a shaving mirror?) are the most critical. Teams that argued hardest about the wrong items usually scored worst.

Psychologist Gerd Gigerenzer would recognise this pattern instantly. His decades of research at the Max Planck Institute showed that simple heuristics consistently outperform complex analytical tools in uncertain environments. The sextant is the complex tool. The mirror is the heuristic. People reach for the sextant because it looks like the serious answer. The mirror wins because it does one thing well and requires nothing else. That’s the lesson most teams miss, and it transfers directly to how they make decisions at work.

How to Score and What the Scores Mean

Scoring is simple: add up the absolute difference between each ranking and the expert ranking. Lower is better. The comparison between individual and group scores tells you whether collaboration helped or hurt.

For each item, subtract the expert rank from the person’s (or group’s) rank and take the absolute value. Add all 15 differences together.

Example: if someone ranked the mirror as 5th but the expert says 1st, that’s a difference of 4. Add that to all 14 other differences for the total score.

The number that matters most is the gap between the average individual score and the group score. If the group scored better than the average individual, collaboration worked. If the group scored worse, something in the team dynamics overrode the right answers.

In my experience running this exercise, roughly a third of groups score worse than their best individual member. That’s the finding that should make any manager sit up and pay attention. It means the team process is actively suppressing good judgment.

Nassim Taleb would call this useful pain. In his concept of antifragility, systems that experience stress and face the truth about their weaknesses become stronger over time. A team that scores 85 on this exercise and stares honestly at why during the debrief will make better decisions six months from now than a team that scored 30 and never discussed what happened. The bad score isn’t the problem. Refusing to look at it is.

What to Look for During the Debrief

The debrief is where the exercise earns its time. Without it, people walk away having had a fun argument about a shaving mirror. With it, they walk away knowing something about how their team actually works.

Here are the five patterns I see most often, and the questions that surface them:

1. The Dominant Voice

One person steered the group toward their individual rankings through confidence rather than correctness. The group agreed not because they were persuaded, but because arguing felt like too much effort.

Ask: “Did anyone change their mind during the discussion but not say so out loud? Why not?”

2. The Silent Expert

Someone in the group had a better individual score than the group’s final answer. They knew more about survival than the collective, but nobody asked or they didn’t push.

Ask: “Who had the best individual score? Did the group hear from them during the discussion? If not, why not?”

3. False Consensus

The group “agreed” by averaging or voting, producing a ranking that nobody actually believed in. The score looks reasonable but nobody owns it.

Ask: “Was there any item where the group ‘agreed’ but you personally still disagreed? Did you say so?”

4. The Time Pressure Trap

The group rushed through the last five items because time was running out. The rankings for items 11 through 15 were essentially random.

Ask: “How did your decision quality change as time ran out? Did you spend equal time on every item, or did the last few get decided in 30 seconds?”

5. The Wrong Debate

The group spent most of its time arguing about the middle-ranked items (7 through 12) while getting the critical top items wrong. They optimised the margins and missed the fundamentals.

Ask: “Which items did you spend the most time debating? Were those the items that mattered most for your score?”

After surfacing these patterns, connect them to the team’s real work. “In the exercise, the dominant voice overrode the silent expert. When has that happened in an actual project meeting?” The exercise is a mirror. The debrief is where people look into it.

How to Adapt Lost at Sea for Remote Teams

Lost at Sea works remotely with minimal changes. The individual ranking phase is actually easier online because people can’t accidentally see each other’s answers. The group discussion needs a structured digital tool to replace the paper-and-pen approach.

Here’s what works:

• Individual ranking: Send participants a shared Google Sheet or Form with the 15 items. Give them 10 minutes to fill in their rankings. The form prevents them from seeing others’ answers.
• Group discussion: Use a shared document or Miro board where everyone can see the group’s emerging consensus ranking in real time. The facilitator screen-shares and updates the rankings as the group discusses.
• Scoring: A simple spreadsheet with a formula that auto-calculates the difference between each ranking and the expert answer. Share the screen so everyone sees the scores appear.
• Debrief: Same questions as in person. Remote debriefs sometimes surface more honesty because people type what they wouldn’t say out loud.

One thing to watch: remote teams tend to reach consensus faster, which sounds like a benefit but often means less genuine discussion. People agree sooner because the social cost of disagreeing on a video call is higher than in a room. Build in explicit “disagreement time”: ask each person to name one item they think the group got wrong before finalising.

When to Skip This Exercise

Lost at Sea is not the right exercise for every team. It has legitimate limitations that most facilitation guides ignore. Knowing when to skip it is as important as knowing how to run it.

The exercise was created by J. William Pfeiffer and John E. Jones in 1974, published in their Annual Handbook for Group Facilitators. The answer key reflects the maritime survival knowledge of that era. It predates GPS, satellite beacons, and modern life raft equipment. If your team includes anyone with actual maritime or Coast Guard experience, they will notice the gaps and the exercise loses credibility.

Skip Lost at Sea when:

• Your team has done it before. Once people know the answers, the disagreement is manufactured. There’s no learning in arguing about items when you already know the mirror is number one.
• Someone in the group has experienced a maritime disaster or near-drowning. The scenario is fictional, but the stress response is real. Ask about this during preparation, not after someone goes quiet in the middle of the exercise.
• Your team is cynical about team-building exercises. Senior engineers and experienced professionals sometimes dismiss survival scenarios as childish. If your team has a track record of rolling their eyes at forced activities, this one will get the same treatment. The r/Managers community on Reddit has documented this pattern repeatedly.
• You’re using it for assessment rather than development. Industrial-organisational psychologists note that the exercise has no peer-reviewed validation as a predictor of real-world team performance. It’s a teaching tool, not a diagnostic instrument. Don’t use scores in hiring, promotion, or performance decisions.
• Your team has fewer than four people. The exercise needs enough diversity of opinion to generate real disagreement. With three people, there isn’t enough friction to make it interesting.

When you do skip it, the alternatives that produce similar group-dynamics insights are Desert Survival (same format, different scenario), the NASA Moon Landing exercise (same format, more accessible to non-maritime audiences), and the Marshmallow Challenge (different format, similar insights about collaboration and iteration).

Frequently Asked Questions

How long does the Lost at Sea exercise take?

The full exercise takes 45 to 75 minutes depending on group size and how deep the debrief goes. The debrief should take at least 50% of the total session time, according to experienced facilitators on the r/teambuilding community. Shortening the debrief below 15 minutes defeats the purpose. The ranking is the setup. The debrief is where the exercise pays off.

What is the correct ranking order for the Lost at Sea exercise?

The expert rankings on this page are based on US Coast Guard guidance for open-ocean survival. Note that these rankings come from the original 1974 Pfeiffer and Jones exercise and reflect the maritime survival knowledge of that era. Some items and priorities have shifted with modern technology (GPS, EPIRB beacons, satellite communication). The exercise remains useful for teaching group decision-making dynamics, not as current survival advice.

What is the best group size for this exercise?

Four to six people per group works best. Below four, there isn’t enough diversity of opinion to create meaningful disagreement. Above six, the quiet members get drowned out and the exercise reveals less about actual team dynamics. If you have more people, run multiple groups simultaneously and compare their scores at the end.

Is there an online or virtual version of Lost at Sea?

Yes. Use a Google Form for individual rankings (prevents participants from seeing each other’s answers), a shared document or Miro board for the group consensus phase, and a spreadsheet with auto-calculated scoring. The r/facilitation community recommends structured turn-taking and silent brainstorming for the digital version, because dominant personalities are even harder to manage online than in person.

What are the criticisms of the Lost at Sea exercise?

Several are legitimate. The answer key dates to the 1970s and predates GPS and satellite beacons, so the survival priorities don’t reflect modern equipment. Industrial-organisational psychologists note the exercise has no peer-reviewed validation as a predictor of real-world team performance. Survival communities on Reddit have pointed out that the shark repellent item has no recorded efficacy and that the exercise undervalues water procurement. The exercise works as a group dynamics teaching tool but should never be presented as factual survival guidance. See the limitations section above for when to skip it entirely.

What’s the difference between Lost at Sea and the Desert Survival exercise?

Same format, different scenario. Desert Survival crashes a plane in the Sonoran Desert instead of sinking a yacht in the Pacific. The items change (water becomes even more critical, signalling changes to flares and mirrors, navigation to maps and compass). The debrief questions and scoring method are identical. Desert Survival tends to produce stronger disagreements about water versus signalling because the heat makes hydration feel more urgent.

The Bottom Line

Lost at Sea works because it gives a team a structured disagreement with a verifiable answer at the end. That’s rarer than it sounds. Most team-building exercises have no right answer, which means they also have no way to tell the team whether their process made them smarter or dumber.

This one does. And the answer is often uncomfortable. The group that argued the most isn’t always the group that scored best. The quiet person isn’t always wrong. The items that seem most important are often the least useful.

After running this exercise more times than I can count, the pattern I see is consistent: teams that listen to their quietest members score better than teams that listen to their loudest. That’s not a nice sentiment. It’s what the numbers show.

Your team is about to spend 45 minutes arguing about a shaving mirror and a sextant. Let them. Then ask them what they noticed about how they argued. That’s the real exercise.