A dive briefing for a training dive may include more skill, background and review information, but the briefing should be restricted to information that is likely to be necessary or useful on that specific dive. Additional information can be counterproductive if it distracts attention from the core material, or reduces the likelihood of the important information being remembered and used correctly during the diving operation. Scientific diving example:  Standard topics: Other topics that may be relevant in some cases:  The PADI checklist for dive briefings for recreational diving lists 10 points: Some of these cover things every trained diver should know, but experience has shown that entry level divers who only dive a few times a year tend to lose their knowledge and skills due to lack of practice, and need to be reminded. A dive briefing may be required in terms of statutory law, regulation, code of practice or organisational operations manual, for diving where there is a duty of care to employees or customers, or it may be merely recommended. In jurisdictions where recreational diving is unregulated, private recreational divers are generally not required to conduct or attend a briefing when they are diving solo or in independent buddy pairs and taking responsibility for their own safety and dive planning. Clubs will often provide a briefing for groups on club outings by an experienced diver who knows the area relatively well.