Your first promotion to a supervisory role at sea, whether as a bosun, leading hand, head waiter, housekeeping supervisor or junior officer, changes your job overnight. Yesterday you were responsible for your own work. Today you are responsible for a team’s safety, standards and morale. Technical skill got you promoted; leadership skills at sea are what make you succeed in the new role.

This guide covers the core skills new supervisors need, how leadership fits into STCW requirements for officers, and practical habits you can start using on your first day.

What Changes When You Become a Supervisor

• You lead people who used to be your peers. Friendships stay, but you now have to give instructions and correct mistakes fairly.
• You own the safety of the task. If a job is unsafe, you are the one who must stop it.
• You communicate upwards and downwards. You pass instructions from officers or department heads to your team and report problems back.
• You are a role model. If you skip PPE or shortcuts procedures, your team will too.

Leadership in STCW: What Officers Must Know

Since the 2010 Manila Amendments, STCW includes leadership competences for officers. At operational level, officers must demonstrate the application of leadership and teamworking skills; at management level, the use of leadership and managerial skills. These cover areas such as workload management, decision-making, communication, situational awareness and the human element. If you are working towards an officer certificate, expect leadership training to be part of your pathway. The exact course your administration accepts depends on the flag and your certificate, so check before booking.

Marine Pro Academy’s HELM – Human Element, Leadership and Management course covers these principles as professional development. Ratings and hotel supervisors who are not on an officer pathway can still benefit from the same skills.

Five Skills Every New Supervisor Needs

1. Clear Briefings

Before a task, explain what will be done, who does what, the hazards and when to stop. Keep it short and ask one or two people to repeat the key points back. A briefing is only useful if it was understood, not just delivered.

2. Closed-Loop Communication

On a multinational crew, a polite “yes” does not always mean “I understood”. Give instructions in simple language, avoid slang and ask for confirmation in the person’s own words. Our Effective Communication Onboard Ships and Maritime English courses help build this skill.

3. Delegation

New supervisors often try to do everything themselves. Match tasks to people’s experience, explain the standard you expect and check progress at agreed points. Delegating well develops your team and frees you to watch the bigger picture, including safety.

4. Fair, Specific Feedback

Describe what you saw, not the person’s character. “The handover missed the pump status” is useful; “you’re careless” is not. Give feedback privately where possible, recognise good work, and follow up to see whether things improved.

5. Stopping Unsafe Work

The most important leadership decision is sometimes to say “stop”. If conditions change, equipment looks wrong or someone is unsure, pause the job and reassess. A team that sees its supervisor stop unsafe work learns that speaking up is welcome.

Example: A New Bosun’s First Mooring Operation

A newly promoted bosun leads the aft mooring team for the first time. Before arrival, they brief the team on line order, snap-back zones and hand signals, and confirm that everyone knows who communicates with the bridge. During the operation they position themselves where they can see both the lines and the team. Afterwards they hold a two-minute debrief: what went well, what nearly went wrong and what to change next time. That simple routine of brief, watch and debrief is the core of practical leadership at sea. For the safety side, see our Mooring: Risk Assessment and Safety of Personnel course.

Common Mistakes New Supervisors Make

• Trying to stay “one of the crew” and avoiding difficult conversations.
• Doing the work themselves instead of supervising it.
• Giving long, complicated instructions without checking understanding.
• Correcting people in front of others.
• Ignoring fatigue in the team during busy periods.

Courses That Support New Supervisors

• HELM – Human Element, Leadership and Management
• Maritime Leadership at Sea: Delegation and Empowerment for Ship Officers
• Onboard Mentoring
• Safety Leadership and Safety Awareness

These courses support professional development. They do not replace any certificate of competency or statutory training required for your position, so confirm the specific requirements with your employer or flag administration.

Frequently Asked Questions

Is leadership training mandatory under STCW?
For officers, yes: leadership and teamwork competences are part of STCW requirements at operational and management level. For ratings and hotel supervisors it is not usually a statutory requirement, but many companies value it.

How do I handle supervising former colleagues?
Be consistent and fair, explain the reasons behind decisions, and keep corrections private and focused on the task.

Can I take leadership courses online between contracts?
Yes. Professional-development courses such as HELM or Effective Communication can be studied online, at your own pace, during leave.

Lead by Example

Good supervisors at sea brief clearly, check understanding, delegate wisely and stop unsafe work without hesitation. Build these habits from your first day in the role, and support them with training that strengthens your communication and leadership. Browse Marine Pro Academy’s Soft Skills courses, Safety & Security courses and full course catalogue to plan your next step.